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 Receiver Material: ABS Support: bluetooth-compatible V2.0 A2DP V1.2 Connector: Device with 30-Pin Dock Transmission Distance: Up to 10 Meters Size: 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store