L21 Digital Display Bluetooth In-Ear Headphone 5.0 Binaural Universal Stereo Headset Describe: A new power display is added, and the power of the charging compartment and earphones can be seen at a glance. Take the headset out of the charging compartment to automatically turn on, and turn on the phone’s Bluetooth to automatically match. It fits the ear canal and is comfortable and non-feeling. The multi-process design of the body can effectively sweat from damaging the components. earphone use: equivalent to two independent earphones, which can be used separately. Use of earphones: Binaural high-definition stereo sound quality, the pure and natural sound, let you intoxicated. Size: 10*10*3.5cm Parameter: Product model: L21Pro Bluetooth version: 5.0 Working distance: 1Om Charging time: about 1 hour Life time: about 4 hours Battery capacity: 350mAh Standby time: about 4 hours Include: A pair of headphones 1*charging box 1*Data cable 1*Instruction 2 pairs of earplugs