Specifications: Bluetooth V2.1 technology No software setup required, easy to use Supports profiles: A2DP & AVRCP Supports pairing with Bluetooth-compatible stereo headsets/earphones for play/pause, forward/backward control Supports automatic pairing (no button press required) Supports pairing PIN codes: 1234, 0000, 8888 Frequency range: 2.42 to 2.480 GHz (ISM) spectrum Supports automatic standby mode: device enters standby to save power when no Bluetooth headset/earphone is detected within a certain time Compatible with iPhone, iPod mini, iPod nano, iPod video, etc. Compatible with 30-pin dock connector Type: Bluetooth transmitter Material: ABS Frequency range: 2.42 to 2.480 GHz (ISM) spectrum Working current: 40mA (Max) Transmission distance: 10 meters Dimensions: 9cm x 6cm x 1cm / 3.54in x 2.36in x 0.39in (Approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Please allow slight dimensional variations due to manual measurement. Package Includes: 1 x Bluetooth Transmitter