3 in 1 Transmitter Receiver: The USB Bluetooth 5.0 audio transmitter receiver can transmit audio from non-Bluetooth audio sources (TV, PC, MP3, CD player or book reader, etc.) to Bluetooth headsets and speakers. And you can also make your non-Bluetooth headsets and speakers receive audio from Bluetooth audio sources (mobile phones, tablets, etc.). You can easily switch between transmitter and receiver modes with the push of a button Easy to Use: Just tap the switch to switch between transmitter and receiver modes. Easy connection using advanced Bluetooth technology and 3.5mm audio cable (included) Bluetooth 5.0 + EDR: By inserting a Bluetooth adapter into a non-Bluetooth device to achieve wireless connection with various Bluetooth devices. It can be stably connected to TVs, stereos, PCs, MP3s, cars, speakers, earphones, smartphones, tablets, and reaches a maximum range of 50 feet (15m) outdoors and a maximum range of 33ft (10m) indoors USB Power Supply: THe USB has a power supply function. During use, power must be supplied through USB ports (such as power adapter, PC, car charger, and other USB ports). As long as the receiver of the Bluetooth transmitter is powered on, you don't have to worry about running out of power while listening to music