Plug-in radio transmitter board type RTS9004E for use in indoor stations of the TASTA series in protected indoor areas. For converting the door call signal into a radio telegram and forwarding it for a maximum of 10 seconds, e.g. to the RCP04E socket radio gong. See product information. Plug-in radio transmitter board type RTS9004E. Power supply 5.2 V DC. Frequency 868.30 MHz (1 channel). Permissible ambient temperature -5 degrees C to +40 degrees C. Protection class IP20. Dimensions: H 35 mm x W 26 mm x D 8 mm