Description:

Product material: non-toxic environmental wood;

Working: The siren consists of infrared transmitter and a light-sensing alarmer. During operation, When an object touches the infrared light, the alarm horn will sound and the warning light will also illuminate;
Applicable age: 8 - 14 years old;

It can be used as a physics teaching experiment, great to cultivate students and kids hands-on ability;

4 x AA(5V DC) battery powered, not included;

Specification:

Size: approx. 6.4 x 7 x 7cm/ 2.52 x 2.76 x 2.76inch

Package Includes:

1 Set of DIY Mini Alarm Guard