Easy to use by connecting directly 30-pin dock to change the common sound-box to Bluetooth sound-box. Support digital products using Bluetooth, such as for , for , Bluetooth cell phone, Bluetooth PC. Complies with Bluetooth V2.0, support A2DP V1.2. Plug and play. Powered from 30-pin dock. Type: Bluetooth Music Receiver Bluetooth Standard: V2.1 or above Transmission Distance: 10m Transmission Speed: 30Mbps Frequency: 60MHz Size: 4.35cm x 3.55cm x 0.7cm/1.71inch x 1.40inch x 0.28inch (.) Item Type: Adapter color:Black Material:plastic Package Contents: 1 x Bluetooth Music Receiver(Other accessories are not included.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.