Description: brand new and high quality Feature: Bluetooth audio receiving and transmitting 2in1 function, suitable for a variety of equipment.Bluetooth 5.0 technology, 15 meters transmiion distance, automatic matching.Built-in noise reduction HIFI sound quality, brings you a clear voice sound.Support hands-free calling, one-click answer/end the call. One-key mode switching, blue light for receiving, red light for transmitting.This Bluetooth adapter can be used in almost all digital products with audio input and output (3.5MM audio interface), only need to connect the audio to the input/interface. Such as computer, TV, projector (transmit mode) / speaker, earphone, car (receive mode).No internal battery, external power supply.No drives needed, plug and play. Specifications: Item Type: Bluetooth 5.0 Audio Receiver TransmitterMaterial: ABS+MetalSize: 45x20x11mm/1.7x0.7x0.4inColor: BlackBluetooth Version: 5.0Transmiion signal distance: 15mInput voltage: DC5VInput interface: 3.5MM audioSuitable type: computer, TV, projector (transmit mode)/speaker, earphone, car machine, call (receive mode)Quantity: 1 Pc Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Bluetooth 5.0 Audio Receiver Transmitter1 x 3.5mm Audio Cable1 x User Manual