CELLY Bluetooth® Headset with Micro and Black Control Celly bhdropbk Bluetooth headphones with light structure, flat anti-tangle cable and helmets ensure total comfort. Speaker diameter: 14.2 mm; Impedance: 32 ohms frequency response: 2.48 ghz microphone: remote control: answer button and volume control weight: 11 g; battery capacity: 55 power: 0.203 wh type: li-ion type Input connector: microus input connector: 0.5 to music play: 3 h talk time: 3.5 h standby time: 4 h charging time: 2 h; technology: bluetooth operating range: 10 m 3 hour autonomy Equ ipad os headphones with remote control, integrated microphone, response key and volume adjustment system Easy to use Made in Spain