For Chamberlain 371LM 373LM 374LM 3 Button Garage Door Opener Remote 315MHz. ● Works with Purple Learn Button Only - 315mhz frequency. 1.2/3.0 HP Pool Pump. ● LED emission and low battery indicator. ● During transmission, the LED indicator lights up, and during transmission, the indicator light will also flash when the battery is low.
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