Wireless headphones with battery life up to 22 hours, Super Bass technology for powerful sound, Bluetooth 4.1, durable design, built-in microphone, control music and calls directly on the headphones. Top of the range elegant headphones made from highly-durable materials. The controls are intuitive, finely-tuned and located directly on the earcup. The padding cuts you off from the outside world, blocking out any ambient noise, leaving you with crystal-clear sound. With a diameter of 40 mm, the speakers bring the music to life. Battery: 3,7 V / 520 mAh. Charging Input: 5 V / 1.0 A. Charging Indicator: Red LED. Standby Time: up to 350 hours. Playback Time: up to 22 hours. Charging Time: 3 hours. Working Range: 10 m. Bluetooth Version: 4.1 + CSR chip. Speaker Diameter: 40 mm. Impedance: 32 Ohm. Frequency Range: 20 Hz - 20 Khz. Package content: Headphones, Micro USB charging cable, 3,5mm jack audio cable, Headphone bag, 3 LAMAX stickers, manual. Colour: Black/Turquoise