Top Positive Review for Alarm System on Banggood SEA|Shopping Southeast Asia

18% OFF DG HOSA 433MHz Window Door Sensor PIR Sensor Wireless Remote Controller Alarm System US$8.99 US$10.99 View It

Overall:

Waterman 17/04/2019

I bought the Digoo 433 MHz Window Door Sensor, together with a Digoo DG-ROSA 433MHz wireless DIY Standalone Alarm system. It all Works perfectly as advertised. I use the alarm system to secure a boat, at a distance of 35 meters from my house. Therefore I needed more range. So I soldered a piece if wire of 35 cm to the unit (35 cm = 1/2 Wavelength, which is 70 cm). This piece of wire functions like an antenna and effectively doubles the range. (See photo, to see where to solder the antenna wire to the Door Sensor unit.)

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