The USAMS TWS NX10 headset is comfort and great design in one. Small and lightweight, they will accompany you everywhere - at work, during exercise. Discharged headphones are not a problem, after just 10 minutes of charging you can use them for another 2h. Thanks to their dual ENC microphones and active noise cancellation, they suppress up to 90% of background noise for more comfortable conversations. Using Bluetooth 5.2, the transfer speed is doubled. Product features: - Material: ABS + PC - Bluetooth version: 5.2 - Sensitivity: 119 ± 3db - Communication range: up to 12 metres - Speaker diameter: 13 mm - Frequency response: 20 Hz ~ 20 KHz - Impedance: 32 ? - Weight of headphones: approx. 3.6g x2 - Earphone battery capacity: 35 mAh - Playback time: approx. 5h - Charging case weight: approx. 31g - Battery capacity of case: 320 mAh - Charging time of headphones: approx. 1h - Standby time: approx. 35h - Size of charging case: 52x46.5x24.6mm