2.4 G wireless transmission can reach 10 meters barrier-free distance

Products Descriptions:     
Specification 
wireless technology:2.4GHz 
working distance:10m 
unit size:93.0(L)*64.2(W)*38.8(H)mm 
unit weight:56g(except battery, receiver) 
button number:4(include CPI) 
keystroke route:0.8mm 
key switch operating force:70±5g 
key life:over 3 million times 
rated working voltage/current:DC 1.5V/28mA 
power supply:1AA battery  *Please use alkaline battery 
color:iron-grey、azure  
System support: 
Windows ME/2000/XP/Vista 
Certificate: 
FCC/CE 
Packing: 
2.4G wireless mouse 
mini receiver 
1AA batteries 
user manual