Bluetooth Version: V4.0 Operating range: Wearing Type: Neckband Function: Voice prompt, Answering Phone, Voice Control, Microphone, Noise Cancelling, Stereo Talk Time: 12 Hours Music Time: 12 Hours Standby Time: About 200 Hours Charging Time: About 2 Hours Interface: Micro USB (Universal Serial Bus) Impedance: 16 ohm Frequency Range: 20 Hz-20 K Hz Battery Type: Built-in Rechargeable Battery Battery Capacity: 200m Ah Net Weight: 80 g / 2.82 oz