DUO BT Independent wireless Bluetooth earphones

& Eacute; DUO BT wireless bluetooth headphones Discover the Ryght Freedom Uunique wireless headphones. No cables, no restrictions. Sound power even without wires: Our goal is to provide a completely wireless solution. The Freedom Uunique headphones are ultra ergonomic and intelligently designed to fit all ears. Connects with most smartphones and tablets via Bluetooth wireless technology. Advantages: Recharges the earphones 10 times in one case charge High autonomy lithium battery Ergonomic 100% wireless Features: Bluetooth version: 4.2 Voice autonomy: Up to 3h Battery life: Up to 2h30 Wireless range: 8m Charging time : 2h Lithium battery Case recharging time: 4h Audio specifications: Sensitivity: 93dB Impedance: 16 Max input power: 0.5mW Response frequency: 20-20Khz