Feature:1. Compact structure, with powerful wireless audio streaming function.2. Put this transmitter or receiver in your backpack or laptop bag and carry it with you.3. Wide compatibility, through the included 3.5mm cable, the transmitter or receiver adapter can be widely used in your computer, laptop, home stereo system, headset, smart phone, Mp3 player, CD player, etc.4. The extremely portable and lightweight wireless audio transmitter or receiver adapter is good wireless audio solution for various situations and purposes.5. It is a Bluetooth audio receiver and a Bluetooth audio transmitter. It can also be used as a Bluetooth sound card, which is easy to switch and operate.Specification:Condition: 100 percent brand newItem type: Bluetooth Audio Receiver TransmitterMaterial: ABSWeight: Approx. 35g Bluetooth version: 5.0Working distance: Approx. 10M or 32.8ftSupply voltage: 5VPairing name (receiver mode): ZF-169PlusBluetooth version: Bluetooth V5.0 EDRBluetooth configuration files: A2DP or AVRCP (receiver mode just)Operating range: up to 15 meters or 50 feet (without any obstructing objects)Power mode: USB 5v power supplyOutput connection mode: 3.5mm stereo interfaceInput connection mode: 3.5mm stereo interfaceTransmitter mode: red led light is onReceiver mode: blue led light is onMode switching: Switch the mode by switching the TX or RX switchCompatible: Suitable for Android, for IOS system phones and tablets, and Bluetooth speakers or earphones that support A2DP protocol connection.Package List:1 xBluetooth Audio Receiver Transmitter 1 x Instruction2 x Audio