Overview : 

The KM4802 combo has an elegant, stylish design.  

The low noise, ultra-slim design makes for quiet and easy typing, while volume and sleep mode hotkeys increase the user friendliness of this keyboard.

The design of waterproof structure lets user easy use whenever the water goes on the keyboard. The obliquity design lets user comfortably type.

Specifications : 

Low Temp: Storage test with Package -40℃,48hrs.
Hith Temp: Storage test with Package.+60℃, 95%RH, 48hrs.
Power on for 5 minutes each 24 hours and check
Test for normal operation with a diagnostic routine.
Temp.:-5℃~+40℃.
Humidity: 5%~95%RH.
Test cycle: 24cycles.
Duration of one cycle: 60mins.
Power on 5minutes and check function, no functionality fail and cosmetic defect.