Description: 30 Pins: The standard 30 Pins line output port can be connected to the base or the audio line input port directly, no need additional line amplification Bt 5.1 Audio Receiver: Adoptes Bt 5.1 technology, this device allows users transmit, play and control songs 10 meters away easily, changing the common sound box to Bt sound box Mini and Portable: small size, a simple black square, easy to carry, the user can enjoy music anywhere without having to connecting lines Cordless Stereo: This cordless audio receiver realizes zero plugging and unplugging, and saves the trouble of cables, support A2DP V1.2, support for Lingo and device authentication, support auto identification of certified and non-certified base audio How to Use: Turn on the speaker, plug the product into the docking seat, LED lights begin to flash, turn on the bt function of the computer, mobile phone, etc, and search or find the bt device, then pair. After this pairing is successful, the front and rear Bt LEDs will flash slowly. If you need change device, you need interrupt the connected device firstly and then connect to others Specification: Bt Version: Bt 5.1 Power Supply: DC 5V Transmission Distance: No less than 10m (33ft) Interface: 30 Pins for Type: Bt Music Audio Receiver 2 indicator lights Not suitable for for Car Stereo System, not suitable for for Digital Speakers. Size Chart: 44x36x7mm/1.73x1.42x0.28inch Package Includes: 1 Piece 30 Pins Bt Music Audio Receiver 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 online shopping!