Awei Ta1 | Active Noise Cancelling Bluetooth Earbud

Ergonomic design, comfortable to wear and not easy to fall. true double-ear wireless. you can use by single or pair. handsfree calling safe and convenient. specifications bluetooth version: v5.0 standby time: 200hrs talk time: 3hrs music play time: 4hrs charging time: 2hrs charging voltage: dc 5v/300ma frequency range: 2.402g-2.480g ambient temperature: 20/+60 c transmission distance: 10m earbuds battery capacity: 40mah / 3.7v charging case battery capacity: 320mah driver specifications driver unit: 10 mm sensitivity: 102db +_ 3db impedance: 16ohms frequency response: 20- 20000 hz