Zoom Bluetooth Universal Transmitter. Connectivity technology: Wireless, Host interface: Wireless. Bluetooth version: 1.2, Maximum operating distance: 21 m. Power consumption: 28 mA. Certification: FCC Part 15B, 15C, CE, RoHS. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 10 - 90 %