COOLBOX Air40 wireless headphones

Specifications: Performance: - Product type: Headset - Wearing style: Head-band - Recommended usage: Calls/Music - Headset type: Binaural - Volume control: Button - Control unit type: On-ear control unit - Control type: Buttons - Foldable: Yes - Plug and Play: Yes Ports & interfaces: - Connectivity technology: Wired & Wireless - 3.5 mm connector: Yes - USB connectivity: Yes - USB connector: USB Type-C - Bluetooth: Yes - Bluetooth version: 5.3 - Wireless range: 393.7´´ (10 m) Headphones: - Ear coupling: Supraaural - Headphone frequency: 20 - 20000 Hz - Impedance: 32 Ω - Headphone sensitivity: 110 dB - Driver unit: 1.57´´ (4 cm) - Noise canceling: Yes - Noise canceling type: Active Microphone: - Microphone type: Built-in Battery: - Battery operated: Yes - Battery type: Built-in battery - Battery technology: Lithium - Battery capacity: 400 mAh - Battery recharge time: 1.5 h - Battery voltage: 3.7 V Weight & dimensions: - Weight: 6.17 oz (175 g)