SPECIFICATIONA FOR 1139B
Key Features:ChipsetCYW20730
BT:BT 3.0 Version
Material:Aluminum+PU
Charging Port:Magnetic
Charging Current:>200mA
Charging Voltage:3.7 V
Key Life time :5 Million Strokes
Operating Voltage:3.0-4.2v
Sleeping Current:<40Ua
Standby Time :>100days
Working Time:100 Hours
Lithium Battery Capacity:250mAh