Built-in 800mAh safety lithium battery, using low-power and -power technology, 2 hours fast charge, providing long battery life.LED display Real-time monitoring of power: with LED digital display, real-time monitoring of the power of the headset, charging in time when there is no power, the power is clear at a glance.Bluetooth + memory card, can play music. A Bluetooth mobile phone with a memory card can listen to music without a mobile phone. The large memory card can listen to 10,000 songs. Connect immediately after booting. Memory linkage function, can be used after booting, built-in Bluetooth 5.0 chip, can quickly search for data and memory-unitlOS smart voice assistant press and hold for one second to call Siri: our smart voice assistant, Press the headset, you can call the voice assistant, the privacy around you, convenient and comfortableneck hanger can be bent arbitrarily: smooth skin-friendly material, unique memory arc, automatically re- to restore the original shape, adjust the arc at any time, more comfortable and natural to wear.Fully compatible: It can be used in conjunction with Bluetooth, supports multiple APP platforms, and is widely compatible with Android, IOS, and Windows systems.Bluetooth version: v5.0Transmission distance: 10 metersBattery capacity: 800 mAhUse time:100 hoursCharging time: about 2 hoursSupport TF card 32-128G to play music(TF Card not included)Material:ABScolour:blackPackage Contents:1 * Bluetooth earphoneOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.