SENCOR Wireless headphones

Bluetooth headset - TWS, BT 5.0.
Diameter: 10 mm.
Resistance: 32 Ω +/- 10%.
Frequency response: 20 - 20,000 Hz.
Sensitivity: 100 +/- 3 dB (@ 1 kHz)
Microphone sensitivity: -42dB ± 3dB.
Bluetooth: v5.0.
Max. connection distance: 10 m.
Max. charging time: ≤ 2 h.
Max. Playing time: up to 7 h.
Battery type and capacity: 3.7 V 50 mAh lithium ion (each headset) and 3.7 V 400 mAh lithium ion (charging and charging station).
Power: using Micro USB cable.
Weight: 41 g.
Color: black.
Accessories: charging cable, 3 sizes of silicone mounts