Item Type: Bluetooth Digital to Analog Converter Material: Aluminum Alloy Shell Bluetooth Protocol Support: A2DP and AVRCP Transmission Distance: Approx. 15m / 49ft (open area) Input: AUX Optical Coaxial USB Bluetooth Output: AUX RCA Compatibility: For Android system, iOS system mobile phones, tablets, TVs, game consoles, and other Bluetooth device settings, and equipment with input interfaces. Remote Control Battery: 1 x CR2025, 150mAh, Built-in Lithium Manganese Battery (included) 1. [Powerful Features] Built-in antenna for more stable signal transmission and clearer, noise-free sound. Features a beautiful aluminum alloy exterior. Upgraded with infrared remote control for added convenience. Volume is adjustable, and it also supports high and low power adjustment. Easy to install and simple to operate. Small size and lightweight. 2. [Dual Device Connection and Auto-Connect] Connect 2 Devices: Supports connection of 3.5mm port and 2 RCA ports. Auto-Connect: When you turn on your phone, this Bluetooth receiver will automatically connect to the last paired Bluetooth device. Supports music switching. Updated support for U-disk playback. 3. [Super Stable Connection] Bluetooth 5.1 chip ensures continuous pairing, fast transmission, and a 15m / 49ft (open area) range. With 3.5mm AUX port and 2 RCA ports, it can connect non-Bluetooth car systems, wired headphones, speakers, power amplifiers, home theaters, etc. Note: This is only a Bluetooth receiver, not a transmitter. So you cannot use it as a keyboard or mouse. 4. [DAC Converter] Converts digital or coaxial signals to 2 RCA analog L/R and 3.5mm AUX. Connects to external devices like amplifiers via standard RCA/3.5mm AUX. Supports sampling rates of 32, 44.1, 48, and 96kHz. Left and right channel 24-bit SPDIF input bitstream. Provides noise-free electromagnetic transmission. 5. [Auto On and Bluetooth Receiving Function] Auto-on is great for use in a car or other situations where you want it to automatically power on when plugged in. This digital to analog converter is designed for home or professional switching. Updated with Bluetooth receiving function, allowing you to pair your phone with other devices via Bluetooth. Includes: 1 x Coaxial Cable 1 x Optical Fiber Cable 1 x 3.5 Cable 1 x USB Power Cable 1 x Manual 1 x Remote Control 1 x Digital to Analog Converter 1 x 3.5 RCA Cable