Specifications: 

1) RF27M mini wireless rechargeable optical mouse with mini USB receiver 
2) Radio frequency and optical technology 
3) Adopts optical orientation technology, high accuracy and reliability
4) Dispensed with mechanical parts and trackball
5) Dispensed with mouse pad and reflector board 6) Super long working life 
7) Freely 360-degree use within 1.5m radius  800DPI  (2500 frames/s )
8) One channel 256 IDs, no interference even in case of multiple users 
9)Mouse Size:     Receiver Size:  70*24*15mm .   
10) Weight: about 95g Packing: white box. 

White box packing information: 

SIZE: 48*43*27CM G.W./N.W.: 14.5/13.5KGS  QTY: 100PCS/CTN