1：【4-in-1 Multifunctional Adapter】--This Bluetooth audio adapter can be used as a transmitter, receiver, amplifier,and Bluetooth headset at the same time, It’s built in high resolution Bluetooth processor which is suitable for stereo headphones,speakers,home stereo system or car audio (AUX equipment), In transmitter mode, it can transmit audio from non-Bluetooth device to Bluetooth devices. Receiver mode: it can let ordinary speaker/earphone become Bluetooth devices and pair with phone. | 2:【Pair 1 with 100+ devices】: Adapter applied newest Bluetooth 5.2 technical framework which supports audio receiving & transmitting and pair 1-to-multiple devices simultaneously. This Audio adapter adapter can help you share the audio received by Bluetooth to the paird headphones and devices in 1-to-multiple broadcast mode.This allows all the devices to share audio like music,e-book ,video synchronously and privately in the library, classroom or other public places without disturbing others. | 3:【Up to 10 hours Playtime】: Audio adapter is use LE audio technology which allows you to play music or conversation up to 10 hours continuous in Single connection mode and up to 6 hours continuous in Share Mode at normal volume. It continuously streams even while charging. Just use the included USB charging cable to plug into your car charger or PC USB port. The adapter only needs 1 hours to fully charge and you can be back on your way to stream freely. | 4: 【Small and Convenient】：The compact Bluetooth adapter is a clip-on Bluetooth headset with a separate design of headset and earpiece and comes with a specially customized earpiece, It can be clipped to a collar, and the earpiece can be sucked in the Audio adapter or you can put it in the ear when answering the calls or listening to the music. With built-in high sensitivity microphone and CVC8.0 noise reduction technology, this adapter will ensure crystal clear sound even in noisy environment . | 5:【Smart Sensor and Low Delay】: With the built-in G-Sensor and quick answer button , you just need to quickly doulble-tape anywhere on the Audio adapter if there comes a phone call or you want to active the voice assistant . And the adapter is low latency for High-fidelity Stereo Sound, lag-free content streaming in transmitter mode.