Premium wireless dynamic stereo headphones from Synchros S series equipped with technology Bluetooth 3.0, which provide maximum freedom and sound with exceptional resolution and PureBass performance for precise and deep bass. With their advanced technology aptX of digital encryption they ensure high quality of wirelessly transmitted sound, comparable with sound of headphones with cable. Innovative control via touch sensor located on the left ear cup with a microphone allows the user to adjust the volume, change tracks or change the audio settings or call (microphone sensitivity is -42 dBV/Pa @ 1 kHz). On the outer side of the right ear cup is placed sensor of NFC technology that makes it easy to pair headphones with any NFC-enabled device. Comfortable leather ear pads and steel headband ensure comfort even during prolonged use. Headphones also feature first class 40 mm drivers, LED-backlit touch sensor that monitors the user's finger in control, echo cancellation technology for phone calls, rotating mechanism 3D AXIS for ear pads. The user has a choice of wired or wireless application - lithium-polymer battery (3.7 V, 610 mAh), rechargeable via USB, guarantees up to 15 hours when playing music and 20 hours for a call. Bluetooth transmitter provides power <4 dBm, frequency range from 2.402 to 2.480 GHz and modulation GFSK BT /4 DQPSK 8-DPSK supporting BT 3.0, A2DPv1.2, AVRCP v1.4, v1.6 HFP, HSP v1.2. Headphones offer a frequency response of 20 Hz-20 kHz, maximum 115 db SPL and input power of 30 mW. Included is a USB power cable, 3.5mm audio cable, slip case and quick-start guide. Dimensions: 190 x 146 x 77 mm, weight: 275 g, black colour design.