• Wireless Version: 5. 0
• Transmit Range: ≤10m
• Transmitting Power: Class 2
• Frequency Range: 2.402-2.480 GHz
• TF Card Supported: 128M-32G
• Battery rechargeable polymer lithium-on 90mAh
• Charge Time:1 Hour
• Operate Hours: about 4 hours (battery saturation)
• Talking Time: about 4 hours (battery saturation)