Bluetooth pen Model: LB01 Technical standards: Bluetooth version V2.0+EDR Chipset: BlueCore4-Audio Single-chip Applicable models：Support for headsets and hands-free Bluetooth mobile phone models Transmission power Class2 Radio frequency: 2.4GHz-2.480GHz Receiver sensitivity：< -75dB Operation Range：10m Bottom / answer / end / reject the calls, adjust the volume Power Charger：INPUT 100-240VAC OUTPUT 5VDC Voltage: 3.7V Battery: Built-in rechargeable lithium batteries Charging time: 2-5 H Talking time: 3 H Standby time: 90 H Color box size: 115×50×30mm Headset size: 113×15×7mm Headset weight: 12 g