Description: Wireless Listening: Transmit Your Perfect Audio entertainment wirelessly from your smartphone or tablet, and listen to music with perfect sound quality via this wireless Receiver Lightweight and portable: Made of iron material, with a USB power supply cable, requires an external 5V power supply. Easy connection: suitable for most speakers, just connect the adapter to hi-fi speakers, speakers or headphones via standard RCA/AV or 3.5mm jack, you can connect two speakers at the same time to play music. Excellent sound effect: Equipped with 5.0 chip module, let your traditional speakers wirelessly transmit high-quality sound without delay, support up to 10m connection range Easy Pairing: one-click power-back, pair your smartphone or tablet with an audio adapter (receive mode only) Specification: Interface: RCA 3.5 Whether plug and play: plug and play External power supply: with external power supply Transfer rate: 10 Effective working radius: 5 Standard: 5.0 Working frequency: 2.4 Material: iron Power cord:1m Size Chart: 5.7x4.7x1.5cm/2.24x1.85x0.59inch Package Includes: 1 Piece Adapter 1 Piece Charging Cable 1 Piece User Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!