The timer is made of plastic, and it is safe and non-toxic. It is suitable for household appliance, advertising board, road lamp and so on. The timer is anti-interference, easy to use. Feature: Made of plastic, safe and non-toxic, odorless and durable. Suitable for household appliance, advertising board, road lamp, neon light and so on. The timer is accurate with industrial grade chip, easy to use; comes with the backlight screen, easy to use. Reusable and durable: can be used repeatedly and durable for long time use. The timer is anti-interference and store the message automatically, convenient to use. Spec: Condition: 100% Brand New Material: Plastic Voltage: 220V, 110V(Optional) Size: approx. 7.1*4.3*7.1cm/ 2.79* 1.69*2.79in Weight: approx. 168g/ 5.92oz Setting Time: From 1min to 168 Hours Number of Times: 28 Times(Day/ Week) Power-off Memory: 60 Days Battery: Built-in Battery Package List: 1* Timer 1* User Manual 2* Screws Notes: 1. Please allow 0-2cm error due to the manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.