Bluetooth 5.1 adapter with stable signal transmission and a range of up to 20 meters in open space. Includes external antenna connection to enhance signal reception. Bluetooth receiver that connects to older speakers or amplifiers, converting wired o systems into wireless setups. Features digital-to-analog o conversion with coaxial, optical, and 3.5mm auxiliary input options, and supports 3.5mm stereo and dual-channel output. Compatible with TV, PC, projector, amplifier, and TV box. Supports USB drive playback. Includes bass enhancement mode and volume control. Supports o formats including WAV, FLAC, MP3, APE, and MAV. Product Name: Bluetooth Receiver and DAC o Converter Bluetooth Version: 5.1 Modes: Coaxial, Optical, USB Drive, Bluetooth Power Input: 5V Color: Black Material: Aluminum Alloy Package Contents: 1 x Bluetooth 5.1 Digital-to-Analog o Converter (110 x 25 x 85 mm / 4.3 x 0.98 x 3.34 in) 1 x Coaxial Cable (80 cm / 31.5 in) 1 x Optical Cable (80 cm / 31.5 in) 1 x 3.5mm AUX o Cable (80 cm / 31.5 in) 1 x USB-C Power Cable (80 cm / 31.5 in) 1 x Remote Control (batteries not included) 1 x English User Manual Note: The package includes only the items listed above. Other accessories are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement tolerance is +/- 1-3 cm.