Audio-TechnicaExperience the best of wireless portable sound with the AR5BT Wireless Over-Ear Headphones. Sleekly styled for comfort and portability, enjoy up to 30 hours on a single charge. Give up the wires and listen to your music wirelessly with Bluetooth® technology Enjoy High-Resolution sound quality via wired connection through specially designed 45mm drivers Sleekly styled, compact over-ear design enables superb sound isolation Foldable and lightweight for enhanced portability – perfect for travelling 30 Hours battery life for continuous music playback on one charge Integrated volume and mic control switch in the earcup for convenient control of smartphones and other Bluetooth® audio devices Compatible with Qualcomm® aptX™, AAC and SBC codecs One-touch pairing with NFC-compatible Bluetooth® enabled devices Soft, memory foam earpads and easily adjustable headband slider provide a comfortable fit Includes 1.2m detachable smartphone cable, USB charging cable, and carrying pouch IN THE BOX AUDIO TECHNICA ATH-AR5BT 1.2m detachable smartphone cable USB charging cable Carrying pouch SPECIFICATION: 1. Headphones Type: Dynamic Driver Diameter: 45mm (x 2) Frequency Response: 5 – 40,000Hz Maximum Input Power: 1,500mW Sensitivity: 100 dB/mW Impedance: 39 ohms Battery: DC 3.7V lithium polymer battery Battery Life: Continuous use : 30 hours approx. / Standby : 1,000 hours Weight: 242g (without cable) Cable: 1.2m detachable cable for smartphones ,1.0m USB charging cable Accessories Included: Carrying pouch Microphone Type: Condenser Charging Time: 5 hours (0-100% charge) 2. Microphone: Polar Pattern: Omnidirectional Frequency Response: 50 – 4,000 Hz Open Circuit Sensitivity: -44 dB (1V/Pa at 1 kHz)