Make calls wirelessly through your radios with this high-fidelity digital FM transmitter. It has a high-quality built-in stereo microphone, and built-in lithium battery won't drain your device's power supply. This package includes 1, 2.25" x .85" x .50" wireless transmitter and 32.5" Micro USB cord. The transmitter comes packaged in a 6" x 1.15" x 2.5" hanging box.