1. 4 buttons;
2. High stability, SMT chip, frequency stabilization SAW, ultra-high-frequency transistor;
3: Large power;
Power supply : 12V 23A battery (not included ) , please buy battery from here : https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR3.TRC2.A0.H0.X12V+23A+battery.TRS0&_nkw=12V+23A+battery&_sacat=0 .
Operating current: 28-33mA;
Oscillation mode: SAW resonator;
Modulation mode:ASK/OOK;
Operating frequency:433.92MHZ ;
Encoding format: EV1527 fixed code ;
RC Resistance : 330K ;
Transmit power : 200mW ;