Rayson BTM-331 is a Bluetooth Audio Transmitter Module, which enables any device with an analogue audio output, to transmit Bluetooth audio signal. It is a small and low-cost module, that fits in almost any device, and allows for simple integration of Bluetooth audio functionality into the product. This module is capable of transmitting audio data at a range of up to 10 meters, and supports A2DP profile for stereo audio. It is capable of transmitting music from any TV or amplifier with a 3.5mm or RCA input. Additionally, it supports SBC and LC-SBC audio coding algorithm for audio transmission.