Three key remote control small infrared remote control/customizable with battery
2 shots
Product parameters:

★ Size: 86 (long) x 40 (wide) x 6.6 (thick) only half a palm
With small shop 51 & avr test board tx - 1c can do infrared remote control test.
★Standard 38k modulation frequency, suitable for various infrared receiver heads on the market
★ 3v button battery built in for long time and easy to replace