Foldable Headphones with Bluetooth CoolBox COO-AUB-12BL 300 mAh Blue Blue / WhiteIf you're passionate about IT and electronics, like being up to date on technology and don't miss even the slightest details, buyFoldable Headphones with Bluetooth CoolBox COO AUB 12BL 300 mAh Blue Blue White at an unbeatable price. Type: Microphone Earpiece Headphones with Headband Wireless Connectivity: Bluetooth Bluetooth 4. 2 Headphones with Microphone: Yes Colour: Blue White Blue Range: 10 m Frequency response: 20Hz ~ 20kHz Rechargeable lithium