Wireless on-ear high-resolution headphones. Bluetooth wireless technology with mic and volume/control switch built into the earcup for convenient control of smartphones and other Bluetooth wireless devices. NFC (Near Field Communication) functionality enables touch pairing with NFC-compatible Bluetooth wireless technology devices. Remembers up to eight Bluetooth wireless devices. Large 45 mm drivers for outstanding sound quality. LED indicator in earcup displays status of pairing, Bluetooth wireless connection, battery level and charging. Soft, memory foam earpads and easily adjustable headband slider provide a comfortable on-ear fit. Internal battery provides 38 hours of continuous use (1000 hours on standby) on a full charge. 1,2 m cable with mic/controls provides a wired connection for when wireless operation is prohibited (e. g. , in airplanes or hospitals), when battery power is low, or when Hi-Res Audio is desired. Includes 1,0 m USB charging cable and carrying pouch. Frequency Response: 5 - 40,000 Hz. Maximum input power: 1,500 mW (for wired connection). Sensitivity: 103 dB/mW. Impedance: 45 ohms. Battery: DC 3,7 V lithium polymer battery. Battery life: 38 hours continuous use (1000 hours standby). Charging time: approx. 4 hours. Connector: 3,5 mm jack, L-shaped. Microphone: condenser. Microphone sensitivity: -40 dB (1V/Pa at 1 kHz). Microphone frequency response: 50 - 4,000 Hz. Polar Pattern: omnidirectional. Communication system: Bluetooth version 4. 1. Maximum range: 10 m. Compatible Bluetooth profiles: A2DP, AVRCP, HFP, HSP. Support codec: SBC, aptX, AAC. Weight: 185 g. Colour: Black