Features: Precise Optical Mouse Promi optical computer pen mouse moves easily for precise optical tracking with or without a mouse pad, which can works perfectly on the bed. Easy Switch A triple mode BT mouse with 3 way connections(USB+dual BT). You can connect either by USB or BT. Rechargeable Mouse Built-in 450mAh lithium battery, long battery life, no need to change new batteries. Three Backlights The mouse comes with 3 kinds of always-on lights, which are more brilliant to use. The internal structure of the mouse can be clearly seen through the lights. Small and Compact Ultra small and compact design, you can easily fit it in your pocket or backpack, take it from home to office or go for a travel. Specification: Product name: Pen mouse Color: Red, Yellow, Grey, Blue, Purple, Green(Optional) DPI: 800/1200/1600 Wireless transmission frequency: 2.4GHz BT version: V3.0/V5.0 Support system: Windows ALL Mac OS Android Linux Operating distance: 10m Number of keys: 4keys Connection to computer: wireless Working mode: Optoelectronics Interface: Type-C Battery: 450mAh Item size:14*2.3*1.4cm / 5.51*0.91*0.55in(L * W * H) Item weight: Approx.25.2g /0.89oz Package size:16.6*9.2*3.4cm / 6.54*3.62*1.34in(L * W * H) Package weight:93g /3.28oz Packing list: 1 * Pen Mouse 1 * USB to Type-C Adapter 1 * USB to Micro-USB Adapter 1 * USB Receiver 1 * Charging Cable 1 * Carry Bag 1 * User Manual