First watch link security is main concern for various buildings, houses and offices. For this purpose, there are a variety of security alarms available in market which uses various types of technology for intruder detection like infrared sensors, motion sensors, ultrasonic sensors, laser sensors, and more. This is laser alarm security sensor.

• 100% Working || totally hand made circuit ||
• 100% Simple to use
• 100% Durable
• Complete working information in box