The OMNITRONIC WAMS-12 bodypack transmitter is designed for the WAMS-12BT2 portable audio system and includes a cardioid headset microphone. It operates at a fixed carrier frequency of 865 MHz with an RF output of 10 mW and provides a wireless range of up to 30 m with line-of-sight. The transmitter uses two AA batteries, has a three-pin Mini XLR connection, and features an LED battery-capacity indicator. Its black plastic housing measures 6.6 by 2.4 by 11.2 cm and weighs 0.10 kg.