• 【Bluetooth-compatible 5.4 Audio Transceiver】Advanced Bluetooth-compatible 5.4 technology provides stable wireless audio transmission with enhanced compatibility for phones, tablets, and various audio devices. • 【Dual Mode Operation】Functions as both receiver and transmitter, allowing you to add Bluetooth-compatible capability to non-Bluetooth-compatible car stereos, speakers, and amplifiers instantly. • 【Multiple Interface Support】Features AUX (3.5mm), dual RCA outputs, and TF card slot for versatile connectivity with car audio systems, active speakers, amplifiers, and vintage audio equipment. • 【Built-in 450mAh Battery】Internal lithium battery provides wireless operation with support for simultaneous charging and playback, perfect for mobile and outdoor use. • 【5-Meter Stable Transmission】High-gain built-in antenna ensures stable, omnidirectional signal transmission up to 5 meters without obstacles for reliable audio streaming. Specifications: •Model: W25 •Bluetooth-compatible Version: 5.4 •Battery Capacity: 450mAh Lithium Battery •Product Size: 50 × 20 × 72mm (1.96 × 0.79 × 2.83 inch) •Transmission Range: 5 meters •Interface Type: AUX (3.5mm), Dual RCA, TF Card Slot, Type-C •Power Supply: Type-C Charging Port •Audio Output: Dual-channel RCA, 3.5mm AUX •Special Features: Hands-free Calling, Charge While Playing Package included: •1 x Bluetooth-compatible 5.4 Audio Transceiver •1 x One-to-Two RCA Audio Cable •1 x Charging Cable •1 x English User Manual