Nakabayashi Co,Ltd. Digio2 Wired Trackball 5 Button (Black)

Update again: The problem is with the laptop, a Thinkpad W510 running W10/2004. A Lenovo mouse also disconnects. So back up to 5 stars.Update: Spontaneously disconnects. From 5 stars to 1. This may explain why my unit was returned to Amazon.I would not want to discourage you from giving this a try. When it works, it's great!I bought a refurb, which implies that somebody else had trouble. It works perfectly here. Although the maker states "Compatible Bluetooth 2.1: If your PC or Tablet is compatible with HOGP, you can use", meaning low-energy Bluetooth, this trackball works perfectly with Bluetooth 2.1EDR. I verified this by pairing with a Thinkpad W510, and a Thinkpad X61 tablet, both ten years old, both running Windows 10 v2004.Some users report trouble with Bluetooth pairing. It may be a compatibility issue.Unlike any Bluetooth mouse or keyboard I've used with a Bluetooth 2.1 laptop, there is absolutely no turn-on lag. While the typical Bluetooth mouse, when used with an older device needs a little shake to wake it up, the Nakabayashi trackball is precisely as responsive as a wired connection. This implies that when connected with a Bluetooth 2.1 laptop, they don't sleep the mouse. This must have considerable impact on battery life, but the wired-quality responsiveness is worth it. My solution is to carry spare rechargeable NiMH. Note: the battery size is incorrectly given. It takes two AAA's not AA.If you have two mice type devices attached, in my case , while setting it up, a wired Logitech Trackman, and the Nakabayashi , it becomes apparent that there is a sensitivity mismatch. The Nakabayashi is much more sensitive than the Trackman, too much for my thumb. Unfortunately, the, Windows 10 mouse sensitivity is global. Dial the sensitivity down for the Nakabayashi, up for a typical mouse or Trackman.Consider these reasons for buying:1. When life gets back to normal, you want to work in a greasy spoon joint, or a Starbucks, where the table is too dirty to run your mouse.2. You are prepared to trade battery life for wired-usb quality responsiveness.3. My specific reason is to use a Thinkpad in a car, on a lap-desk. There is no place at all to run a mouse. The Nakabayashi sits on the center arm rest.Thoughts: AA batteries are cheaper, and would give much longer battery life. I wish there was a PVA carry case.

Those of us who like the thumb trackball kind of mouse have a very very limited selection.This is the only Bluetooth thumb trackball in existence it seems. I have been using a Logitech M570 mouse for many years...love it, but it uses a mini dongle. My new laptop(Dell Precision 5510) only has 2 usb ports so I really wanted a Bluetooth mouse, but I wont give up the trackball because i use it on many situations where a surface is no good for a regular mouse.The Digio2 Chinese BT mouse is small and oddly shaped. I would say its for small hands. I have somewhat large hands and fingers, this feels quite awkward to use due to its size and the "lump" part in the wrong place. No where near as comfortable and natural feeling as my trusty Logitech M570. However, it is ok for occasional use. The smaller size is nicer for travel and will sit on the palm rest of my laptop without pressing or covering some of the lower keyboard buttons. The trackball work as intended though feels awkward, again due to the size and position it ends up in my hand, the ball ends up in the back palm are between the thumb and finger, so have to move my hand back off the mouse more to use the track ball correctly. The trackball needs to be forward more... If only they made a full size version of this mouse.It has has a tad of weight to it which is surprising. The buttons "click" is very soft and rubber like,completely silent. I like that. Never used a mouse with buttons that feel this way before. The scroll wheel is smooth with no physical "click" or feedback when u scroll, not a fan of that. Forward and back buttons work great.The "speed" button apparently adjusts the DPI. The manual and packing is 100% Chinese, but from a table in the manual i can make out, i think that one red blink the mouse is at 600dpi, and 2 blink it is in "450~1200dpi"...so its auto adjust in a range or something...i don't know. I am not able to tell any difference in mouse sensitivity or movement speed in either mode.This mouse (BT model) was listed for $160 since i came across it a month ago and was international shipped in, not "Fulfilled by Amazon". I guess they finally got some USA stock as it popped up as now $49.99 and Amazon shipping. For $50, sure, its acceptable for this product. But I can't image paying any more for it.Please...make a full size version of this mouse!!!

Finally! I have a bluetooth trackball! Been hounding Logitech for years since I've been a trackball user since the early 1990's. Why Logitech didn't come out with one until recently, I don't know other than the fact that they want me to pay for their USB receiver every time I lose one or it breaks. Each time, it would cost me $10. Total B.S.! The beef I have with them now is their latest one, the MX Ergo is going for $99.99!! It was $129.99 when I ordered this one. Yes, it has more features but not worth it to me. I really hope this company takes a lot of business from Logitech. I was a little concerned with some of the reviews that there were connectivity issues but so far I'm having no problem with that on my MacBook Air. So... the size of this trackball will need getting use to if you have used the Logitech M570 like me for years. However, I find that I like it more. You will have to train yourself not to palm it but just to lay your fingers on it. It's a more delicate ergonomic posture and my palm doesn't hurt at the end of the day like it did before. The buttons and scroll wheel are quiet and feel of higher quality than any trackball that I have used in the past. The price point is fantastic! I'll never buy another M570 again! The cool thing is, I can throw this thing in my pant pocket as I go from room to room seeing patients where I would have to leave my M570 on my desk before. Needless to say, I'm stoked that I found this item since I've been looking on and off for years!Update: I've connected it to my Surface Pro "5" and it works great! Worked with it at least 10 hours today and all is well :-)

la trackball a volte si muove a scatti, non e' sempre precisa;le istruzioni del prodotto sono solo in giapponese.

初めは今まで使ってたトラックボールよりサイズが小さいこともあり違和感がありましたが、速度を遅めに変更して1時間も使ってれば慣れてきて、今ではかなり手に馴染んでいます。無線のトラックボールは初めてでしたが、とてもいいですね。かなり狭い机なのですが小さめサイズなので場所をとりませんし。電池切れにさえ気をつければ使い心地（遅延や、立ち上がりの速さなど）に不満はありません。また、トラックボールは黒基調のものが多くて白っぽいのは少ないので、白系のデザインも選べるこの製品は貴重だと思います。ちなみにこの製品は無線、Bluetooth、有線と3種類ありますが、Bluetoothよりも少し安く、ペアリングなどの面倒がないこの無線タイプを私はお勧めします。BIOS画面でも使えますし、再起動後も全く遅れることなく認識されています。線が見えてることが気にならない人であれば、一番安い有線タイプもいいと思います。

UMPC用に購入。よくレビューで目にするマウスカーソルの飛びや過剰反応にビクビクしながら買いました結論から言うと、マウス設定とBT電源設定の見直しで問題は解決しました。ハード側の問題ではなかったのです。マウスのスピードを下げて、ポインタの精度を高めるのチェックを外す必要があります。そしてデバイスマネージャーからのBT設定で電源を見直し、バッテリー設定を最大パフォーマンスにすることで解決しましたハードウェアとしてみると、ごろ寝マウスとして優秀です。マウスサイズで無線なので、ひょいひょいポジションを変えて楽な姿勢で使用できます。握ったままボールをコロコロすることもできるくらい小さいです（推奨はしません）べたっと手首を机に付けて操作するのでパームレストはむしろ邪魔になります。腱鞘炎になるかと言うと、全くそんなことはなく、可動部は親指だけなので、手首に負担は一切ないです。大型化するよりも小型化すりゃよかったんですねぇ。ボールの滑りはボール受けにエアダスターと、ボールにシリコンスプレートラックボールの鉄板手入れですねマウスジェスチャーソフトと組み合わせると相当操作性は良くなります。場所も取らないのでモバイル向けとしてはこれしかない感じですね競合デバイスが少ないことで立場を保っているような機種です。ほかが参入すると圧倒言う間に淘汰されかねません。ですがBTトラックボールでこの価格、今だけはとにかく優秀です。それをどう見るかでしょうかね新幹線のような小さな台の上で作業をするときにものすごく効果を発揮します。トラックボールは固定して使うものというのが一般論ですが、無線で小型なのでそのあたりの概念は取っ払えます。膝の上でもいいしカバンの中でも使える。狭いけど仕事しなければいけないというときの切り札になりました。

4ヶ月ほど使用した感想です。Bluetoothタイプを購入。（Windows10にて使用）普段はLogicool M570tをメインで使っています。持ち運び用ノートPCと一緒に使うために購入しました。M570tに比べ、サイズもとても小ぶりですしフィット感などの心配がありましたがそこまで気にならず、慣れてしまえば問題なく使えます。ただ、個体差なのかトラックボール部分の回転がM570tに比べて、一部引っかかりがあり、4ヶ月たってもその引っ掛かりは取れませんでした。必ず決まった場所（トラックボールを覆う外装フチ部分）に手垢がこびり付き、本体も多少削れて来ているのでそこで大きな摩擦が生まれているんだと思います。軽快な回転ではないのでM570tに慣れている方には少々ストレスにはなるかもしれません。また、Bluetoothに起因するものなのかもしれませんが、USB無線タイプのマウスに比べ、パソコン起動時からマウスが認識されるまで少し時間がかかります。そこまで大きなラグではありません。その為、星4つにさせてもらいました。M570tほどフィットしませんが、思ったよりも疲れにくく、普通に使えます。センターホイールがクリック感のない、なめらかな回転のタイプなので好き嫌いは別れると思います。Bluetoothで接続できる点では、USBタイプのレシーバーなども必要なく、持ち運びにもコンパクトに収められるので重宝しております。

某トラックボールマウスの有名なエルゴシリーズとこのモデルを併用しています。手が小さいのでエルゴシリーズはあまりあわず小さめのこのモデルを買ってみました。エルゴは肘までデスクについていないと肩が凝る感じを覚えるのですがこのモデルはそんなこともなく操作できます。トラックボール操作は圧倒的にこちらの方がサクサク動かせて良いです。静音タイプのマウスなので、ホイールを押し込む時にちょっとクセがあるのでそこ以外は気に入ってます。個人的にはもう少し小さくてもいいかなって思いますけど、満足です