Sennheiser BT T100 Bluetooth Audio Transmitter - Bluetooth v4.2 Class 1 - Black - Supports A2DP - optical cable-1.5m/analog 3.5mm cable-1.5m/USB power cable-1.2m - 5V - 29 Channels - ISM 2.4GHz Band (2.4GHz~2.4835GHz) - -80dBm (BR, Max) - 2402 to 2480 MHz (Transmission Frequency) - 20Hz-20kHz Frequency Response - Maximum of 2 Connected Revievers - 508258

Manufacturer Warranty: 12 Months Limited Warranty

Manufacturer Contact Info: http://www.Sennheiser.com/,