Feature: New mini, light, and portable design. Easy to use by connecting directly via 30-pin dock to turn a standard sound box into a Bluetooth sound box. Long-distance playback of your favorite songs from your device through a Bluetooth connection. Supports digital products with Bluetooth, such as touch devices, Bluetooth cell phones, Bluetooth PCs, and PSP. Complies with Bluetooth 2.0, plug and play. Supports A2DP V1.2, compatible with all devices enabled with A2DP stereo Bluetooth. Specification: Transmission distance: up to 10 meters (33 feet). Supported protocol: Bluetooth V2.0, A2DP V1.2 Connector: Devices with 30-pin dock Color: White Material: ABS Size: 4.3 x 3.5 x 0.8 cm Package Contents: 1 x o Receiver Note: The sound quality depends on the transmitting equipment and the o equipment used. We have tested with various devices and achieved good sound results. Sound performance may vary depending on the quality of your phone or MP3 player, as the transmitting device affects the final sound output. The connected o equipment also influences the final sound quality. Tested with a 2.1 stereo system with bass, delivering strong and clear bass performance. Transmission distance may vary based on the transmitting device. In tests, one smartphone achieved over 10 meters, while another showed weaker signal strength at around 8 meters. This confirms that the transmitting device's quality impacts signal range. This item is not compatible with Universal Dock. This item is not compatible with Car Stereo Systems. The package includes only the items listed. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.