IPX4 waterproof/sweat-proof function. Ergonomic design, comfortable fit to wear, firm and not falling. The stylish portable charging compartment can charge the headset. True binaural wireless, you can also choose single ear or binaural mode to use. Take out the headset to automatically pair mode, no need to press the key to turn on. When talking on the phone, both ears can answer. 300 hours standby time. Press key to operate up and down music, answer calls and other functions. Features: Name: Bluetooth headset Net weight: 39g Material: ABS Channel system: stereo Battery capacity: 40mAh, 3.7v/300mAh Drive unit: 6mm Charging time: 1.5h Talk time: 5h Music duration: 4h Sensitivity: 92db±3db Impedance: 16Ω±15% Support agreement: HSP/HFP/A2DP/AVRCP Input charging standard: DC 5V Bluetooth working frequency: 2.402G-2.480G Maximum transmission distance 10M Voice prompt: support Multi-point connection: support Wearing method: into the ear