I7 TWS Bluetooth Wireless Headphones Earbuds For iPhone An

Model: i7s tws wirless version: v4.2+edr impedance: 32ω mic sensitivity:42db wireless frequency:2.4ghz battery capacity:65mah/950mah 4.working temperature: 10-50°c charging voltage:dc5v transmission distance: 12m playing time:5-6 hours charging time: 1-2 hours standby time: 100 hours