Description: This audio transmitter and receiver are great wireless audio solutions for various situations and purposes, built in Microphone, handsfree call when you are busy Transmitter : wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth-compatible headphones or speakers Receiver : wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones Switch between transmitter and receiver modes with the simple flick of a switch, connect using advanced Bluetooth-compatible technology and 3.5mm audio cable. The Receiver Transmitter adapter can widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp3 player, CD player, etc. Specification: Transmission rate: 100Mbps Effective working radius: 10m/33feet Bluetooth standard: 5.0 Working frequency: 2.4Mhz Model: RT01 Charging time: 2 hours Working time: 12 hours Battery type: lithium polymer (400mAh) Product size: 65x45x21mm/2.56x1.77x0.83inch Package Includes: 1 Piece Bluetooth Audio Adapter 1 Piece Micro USB Power Cord 1 Piece RCA 1 Piece 3.5mm AUX Cable 1 Piece User Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!