Specifications:Easy to use by connecting 30-pin dock to change the normal speaker to bluetooth-compatible speaker.Support digital products using Bluetooth.Complies with bluetooth-compatible 2.0, support A2DP V1.2.Powered: via target device(docking station).LED: one LED for paring and charging status.Transmission distance: up to 10 meters.Item Name: bluetooth-compatible Music ReceiverMaterial: ABSSupport: bluetooth-compatible V2.0 A2DP V1.2Connector: Device with 30-Pin DockTransmission Distance: Up to 10 MetersSize: 4.4cm x 3.5cm x 0.8cm/1.73" x 1.38" x 0.31" (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