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 ReceiverBluetooth Standard: V2.1 or aboveTransmission Distance: 10mTransmission Speed: 30MbpsFrequency: 60MHzSize: 4.35cm x 3.55cm x 0.7cm/1.71inch x 1.40inch x 0.28inch (.)Item Type: Adaptercolor:BlackMaterial:plasticPackage 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.