The TDA7100 is a low-power ASK/FSK wireless transmitter operating in the 434MHz ISM band., RF Frequency Range: 427 to 442MHz ISM band. RF Output Power: +5dBm. Modulation: FSK, ASK. OTA Data Rate: 20kbps. Power-down mode. Power supply: +2.1 to +4.0Vdc. Ope