INFRARED LASER ALARM SWITCH SOUND / LIGHT ALARM MOTION IN CHINIOT

100% Brand new Note: This product is a kit, buyers need to assemble their own. AA batteries are NOT included.Picture only for reference. contain 2pcs 2AA Battery holder. no 3AA Battery holder. How it works: In this study, the transistor as a switch. 1: No alarm. When a laser is irradiated onto the photosensitive resistor, transistor ended, active buzzer power off, stop chirping; light off. 2: Alarm. When the laser is blocked, no light exposure to the photosensitive resistor, the transistor is turned on, the buzzer to get the power starts singing while working indicator lights, sound and light alarm.There are red/blue lines, red/black lines, red/yellow lines, random delivery (red positive black negative, or red positive blue negative, red positive yellow negative) Laser diode parameters: Name: Laser small bronze head (red) Transmit power: 150mW Standard size: Φ6 * 10.5 Spot mode: point-like spot, continuous output Laser wavelength: 650nm (red) Optical power: