USB Bluetooth 5.0 Receiver Stereo APTX-HD Low Latency Audio Adapter Features: The iron box Bluetooth receiver uses Bluetooth 5.0 chip to ensure that the high-fidelity Bluetooth audio signal is transmitted to the home stereo system without this function. APTX low latency:APTX low latency(APTX LL)is supported. This mini Bluetooth audio receiver provides high-quality,synchronized sound with slight delay. After plugging into the power socket,the Bluetooth audio adapter can automatically power up and reconnect the previously paired device(Note:This device does not come with a USB power adapter.You can use other DC 5V power supplies) Easy setup:Plug the audio cable into the computer speaker or home stereo system,and then pair it with a Bluetooth audio device(such as a smartphone or tablet). This model is only a Bluetooth receiver, not a transmitter. Compact size,but long range:small enough to fit almost anywhere. The mini Bluetooth audio receiver used for home stereo can achieve a range of up to 164 feet(50 meters)of sight outdoors and up to 50-70 feet(20-30 meters)of sight indoors(barrier-free) Specification: Stereo coaxial output voltage:2.0~2.2Vrms Headphone output:2Vrms Headphone output impedance:22 Ω Bluetooth receiving distance:10~15 meters(no obstruction) Bluetooth format:APTX,APTX-HD,SBC,AC Audio sampling rate:48K 16bit Button:Bluetooth one-button play or pause Working voltage:5V Working current:150~250mA Specifications: Host size:6.4*4.7*1.5cm USB cable length:97cm Accessories:host+USB power cable+manual Color: black Material: aluminum alloy Package includes: 1*Host 1*USB power cable 1*Manual Note: 1.When using headphone output,only 3-plug headphones are supported,and 4-plug headphones are not supported 2.If there is no response when connecting to the power supply,observe whether the middle indicator light flashes If it does not light or flickers,remove the power supply and USB cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.