Bang & Olufsen 1643882 Beoplay H4 wireless headphone offers rich, natural sound and up to 19 hours of playtime. It is made with leather, aluminium, stainless steel and braided textile. Available in violet colour. Bang & Olufsen 1643882 headphones can be connected via Bluetooth or via an audio cable with 3.5 mm mini-jack. The wireless headphones use harness the full power of Bluetooth gives uncompromising wireless sound while listening to music or taking calls. These premium headphones play tirelessly for hours on end. They are equipped with a rechargeable lithium-ion battery that offers up to 19 hours of playtime, taking around two and a half hours to fully charge. Measures 195mm length by 220mm width by 50mm height and weight: 235 g. Specification: Frequency: 20 - 20.000 Hz, Microphone: One electret type Omnidirectional, Speakers: Electro-dynamic driver, 40 mm diameter, Sensitivity: 91 dB/mW - 1kHz, Impedance: 20 Ohm, Bluetooth: Bluetooth 4.2 Supports AAC and SBC codecs, Bang and Olufsen App: Compatible with Bang & Olufsen App, On-device control (remote, touch interface): one slide button for On/Off and Bluetooth pairing, 3 buttons on right ear cup for controlling your music and phone calls: Audio (Play/Pause), Tracks (Next/Previous), Volume (Up/ Down), Calls (Answer/End) and Voice Activation, Battery: Rechargeable Lithium-Ion Battery, Capacity: 600 mAh up to 19 hours with Bluetooth, Charging time: app. 2.5 hours. Package Includes: Beoplay H4 headphones, Quick start guide, 1.25m audio cable with 3.5 mm jack and 0.25m USB to Micro USB cable for charging.