Features:Free switch between one ear and two ears: dual headphones can be connected to a cell phone at the same time, but also monaural connection.BT 5.1 chip: using BT5.1 chip, with DSP anti-interference chip, faster transmission speed, stronger anti-interference.Signal stability: stable connection, ultra-low latency for HD video and synchronized audio picture quality.Intelligent noise reduction: adaptive filtering noise reduction, clear inclusion of the human voice, even if the noisy environment can be heard clearly.HIFI surround sound: multi-level stereo sound, enhancing the depth of sound, sense of presence and spatial sense.Can charge the phone: large-capacity charging compartment, not only to charge the headset, but also to the phone life.Automatic connection at power on: the first time you need to connect manually, you can connect two BT devices at the same time, switch at any time \ listening to songs \ games \ calls are not delayed.Specifications:Model: TG02Color: Black / White (Optional)Material: ABSBT version: V5.1Speaker: Copper Ring 13mmAudio format: WAV\WMA\APE\FLACEarphone capacity: 50MAHTalking time: about 4 hoursMusic time: about 4 hoursEffective distance: 10mBattery compartment charging time: about 1 hourPackage size: Approx.11*9.7*3.2cm/4.33*3.82*1.26inchPackage weight: Approx. 100g/3.53ozPackage List:1 * Set of BT Headset