How do a change this to normally closed on the relay? do not see how to do this

There is a small 3 pin connector on the RX unit, the unit with 4 wire connections. The 3 pin connector on the top portion of the board has a 2 position jumper cap on it. I believe the left 2 pins make it normally open and the right 2 pins make it normally closed, or vice a versa.

Is there an app for this? There are no directions or instructions. How does it work?

There is no app for this, but there is a instruction in the product package. When used for anti-theft, it needs to be matched with the alarm host. This can not be used alone, but it can also be applied to other devices that require switching signals.

How do i hear the alarm if this is outside and i am inside?

There is no alarm, you would have to wire the relay output to activate one if you wished.

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Infrared Beam Sensor,1 Pair Single Photoelectric Detector Active IR Alarm Host for Security System

Product ID: 103689492

Details

Brand
IHC
Color
Black
Item Weight
3.76 ounces
Maximum Range
10 meters
Power Source
Corded

🌞Strong light resistance up to 50,000 LUX

📏10m max detection range

🌧️Fully sealed waterproof & dustproof

฿1674

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Description

🚨 Stay one step ahead with smart, weatherproof IR security!

EFFORTLESS SETUP - Simple wall-mount installation with clear alignment instructions for instant protection.
PRECISION DETECTION - High-power IR transmitter with 90% sensitivity margin ensures no intruder slips by.
ALL WEATHER GUARDIAN - Waterproof, fog & dustproof design keeps your security flawless rain or shine.
SMART LIGHT ADAPTATION - Built-in automatic strong light filter and AGC circuit for flawless performance day or night.
VERSATILE SECURITY UPGRADE - Perfect for offices, homes, stores, and schools—replace outdated PIR sensors with cutting-edge IR tech.

This Infrared Beam Sensor pair features a high-power transmitter and receiver with a 10-meter detection range, designed for all-weather durability with waterproof and dustproof sealing. It resists strong light interference up to 50,000 LUX and automatically adjusts sensitivity in fog or bad weather, making it ideal for professional-grade security in homes, offices, and retail environments.

Specifications

ASIN	B07FZ1XRXQ
Antenna Location	Driveway, Garage, Garden, Lawn, Sidewalk, Terrace
Best Sellers Rank	#282,841 in Electronics ( See Top 100 in Electronics ) #932 in Motion Detectors (Electronics)
Brand	IHC
Color	Black
Customer Reviews	4.0 4.0 out of 5 stars (72)
Frequency	1920 KHz
Item Weight	3.76 ounces
Manufacturer	angshi
Maximum Range	10 meters
Mfr Part Number	qwe123
Model Number	qwe123
Mounting Type	Wall Mount
Number of Items	2
Number of Packs	1
Power Source	Corded Electric
UPC	755101238943

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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฿1674

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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