OY5 is a high-performance and multifunctional headset. It can be used both wired (via the 3.5mm audio cable) and wireless (via Bluetooth). With the high-quality microphone, the headset supports hands-free calls and multipoint technology. The special speakers transmit powerful bass and perfect sound to your ears. OY5 over-ear styling headset is stable, lightweight and comfortable. Features:[4 in 1 Multifunctional Headphone] Stereo Bluetooth + 32G TF Card MP3 player + FM Radio + 3.5mm Wired Headset function.[Wired and Wireless Connection] Easy to pair with almost all Bluetooth-enabled audio devices to enjoy wireless stereo music; with 3.5mm audio jack, it can connect to a variety of music players (Such as, MP3 / MP4, etc) without Bluetooth function.[CVC6.0 Noise Concellation] CVC6.0 Noise Cancellation and high-sensitive microphone reduce ambient noise and grasp the detail of voice. You can get high quality hands-free phone conversation even on the street.[Long Duration Time] Built-in rechargeable Lithium battery lasts up to 20 hours of Talking Time, 10 hours of Music Playing Time and 150 hours of Standby Time in Power Off state per charge cycle.[Ergonomic design] Foldable and adjustable headband length, super soft earmuff, comfortable to wear and easy for storage. Note:The microphone can't work when using the headset as a wire headset.Specifications:Model Number: OY5Type: Over-ear Stereo Bluetooth Headphone with MicBluetooth version: 4.0Support Profiles: HSP, HFP, A2DP, AVRCPTransmission Distance: up to 10mFrequency Range: 2.402GHz-2.480GHzResistance: 16ohmSensitivity: 104dB3dB SPL at 1mW/1kHzRechargeable lithium battery: 400mAhTalking Time: 10-20 hours (depends on the volume)Music Playing Time: 8-10 hoursStandby Time: 150 hours (Power Off State) Charge Time: 2-3 hoursPlug Type: 3.5mm Audio PortMain Item Size (Folding): 16.2 * 11.2 * 7.8cm / 6.37 * 4.41 * 3.07inMain Item Weight: 178g / 6.29ozPackage Size: 16.0 * 12.8 * 8.6cm / 6.29 * 5.04 * 3.38inPackage Weight: 294g / 10.36oz