Features: After adding some accessories, it can be used as an external sensor to test outside temperature and humidity. The case is made of high-quality materials that are resistant to wear and tear for a long service life. This timer includes AAA batteries, no need to buy additional batteries. Large numbers and large LCD screens are very suitable for those who have poor eyesight. Simple and easy to use button design allows children to use without thinking. Specification : Condition: 100% Brand New Material: ABS + electronic components. Add some other accessories. Weight: 80g Colour: as shown in the pictures. Power supply: 1 x AAA Size: approx. 7.5 x 6.5 x 2 cm/2.95 x 2.56 x 0.79 inches. Package List: 1 x Timer. Notice : Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. After adding some accessories, it can be used as an external sensor to test outside temperature and humidity. The case is made of high quality, wear-resistant materials and has a long service life. This timer includes AAA batteries, no need to purchase additional batteries. Large numbers and large LCD screens are well suited for those with vision problems. Simple and easy to use button design allows children to use it without thinking.