Specifications:Easy to use by connecting directly 30-pin dock to change the common sound-box to bluetooth-compatible sound-box.Support digital products using Bluetooth, such as for iPad, for iPhone, bluetooth-compatible cell phone, bluetooth-compatible PC.Complies with bluetooth-compatible V2.0, support A2DP V1.2.Plug and play. Powered from 30-pin dock.Type: bluetooth-compatible Music ReceiverBluetooth Standard: V2.1 or aboveTransmission Distance: 10mTransmission Speed: 30MbpsFrequency: 60MHzSize: 4.35cm x 3.55cm x 0.7cm/1.71" x 1.40" x 0.28" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Music Receiver(Other accessories are not included.)