Features: Integration design of keyboard and mouse Built in Real QWERTY full-function keyboard With media control keys With a real multi-touch pad Crystal keycap to be wearable against use Charming in looking, portable to carry B2.4Ghz RF radio transmission. Main Specifications: Dimension: 151mmX59mmX12.5mm Weight: 100g Suitable temperature: -10 C +55 C Battery Type: Built-in lithium-ion battery Standby time: 500 ~ 700 hours Operation range: up to 30meters Modulation: RF using DSSS mode,a stronger anti-jamming capability Transmit Power: Max + 4dBm Operating Voltage: 3.3V Operating Current: 80mA Charge voltage: 4.2V-5.05V Charge current: