Bluetooth Transmitters features: USB Bluetooth V5.0 Wireless Dongle Adapter Receive & Transmit Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Product specification: Bluetooth version: 5.0 + EDR Operating range: 10 m / 33 ft (no obstacles) Transmitter mode: Red LED on Receiver mode: Blue LED on Mode switch: click the button Product size: 45 * 20 * 9.5mm Net weight: 5g Gross weight: 15g Packaging accessories : 1 * Bluetooth 5.0 receiver transmitter Adapter 1 * AUX AUDIO CABLE 1 * Instruction manual Matching steps: This product is plug and play without driver A: Launch mode - red light 1. Plug the device into the USB port for power supply, switch to the transmission mode, and the red light will flash, and the Bluetooth device status (such as Bluetooth adapter, Bluetooth headset, Bluetooth speaker) will be automatically searched; 2. Insert one end of the 3.5mm audio cable into the aux interface of the adapter, and plug the other end into the audio output port of TV, projector, tablet computer, MP3 player, CD player and other equipment or RCA Audio signal output hole of TV; 3. Turn on the Bluetooth