USAMS TWS IA-Series comfort headset. Comfort and great design in one. Thanks to the use of tri-band tone equalisation, the sound from the headphones is clearer and noise-free. Small and lightweight, they will accompany you everywhere - at work, during exercise or while cycling. The headphones with built-in microphone use the Bluetooth 5.0 +EDR/BDR/BLE standard. The set furthermore includes a dedicated case that acts as a power bank. Product features: - Material: ABS + PC - Bluetooth version: 5.0 - Sensitivity: 112 ± 3db - Communication range: up to 12 metres - Speaker diameter: 13 mm - Frequency response: 20 Hz ~ 20 KHz - Weight of headphones: approx. 3g x2 - Battery capacity of headphones: 25 mAh - Playback time: approx. 4h (at 80% volume) - Charging case weight: approx. 35g - Battery capacity of case: 320 mAh - Standby time: approx. 25 hours