-Official product page link-
 
-FEATURES-
Ultra-compact size: This wireless mini mouse is pocket-ready with no compromise on function; take it anywhere
Plug and play wireless connectivity: The tiny USB Nano receiver fits discreetly in your laptop and stores conveniently inside your mouse for safe-keeping
Comfortable design: It is suitable for both right and left-handed users
Reliability: Thanks to Wireless 2.4 GHz technology, the M187 boasts a range of up to 10 m
Compatibility: Logitech M187 Wireless Mini Mouse is compatible with Windows, Mac and Linux
18-month battery life 
 
-SPECS-
Sensor technology: Advanced Optical Tracking
Sensor Resolution: 1000
Battery life: (6-month battery life) 1
Battery type: 1 AAA battery
 
Dimensions:
Height x Width x Depth: 81.9 mm x 49.4 mm x 31.8 mm
Weight (with batteries): 51.9 g