Esperanza EH220 Bluetooth headphones Headband, Black

Product colour: Black Headset type: Binaural Wearing style: Head-band Bluetooth profiles: AVRCP Connectivity technology: Wireless Wireless range: 10 m Bluetooth: Yes Bluetooth version: 5.0 Continuous audio playback time: 5 h Power requirements: 5V DC Talk time: 7 h Battery recharge time: 2 h Battery technology: Lithium Polymer (LiPo) Battery capacity: 200 mAh Frequency response: 30-16000 Hz Microphone sensitivity: -42 dB Headphone sensitivity: 105 dB Impedance: 32 Ω Headphone frequency: 20 - 20000 Hz Driver unit: 4 cm