The solar controller is made of plastic+ electronic , and it is safe and non-toxic. It is suitable for the street lamp; it can be used repeatedly and durable for long time use. Features: High quality plastic+ electronic material, steady and sensitive. It is waterproof, which can lengthen the lifespan of the solar controller. It can quickly charge your lamp according to the solar controller. Reusable and durable: it can be used repeatedly and durable for long time use. It can protect your device when it is over-charged, over-discharged and short-circuited. Specifications: Condition: 100% Brand New Material: Plastic+ Electronic Color: Silver Size: approx. 8.5*5*2cm/ 3.34* 1.96* 0.78in Weight: approx. 158g/ 5.57oz Working Temperature: -35~65℃ Voltage: 12V/24V Package List: 1* Solar Controller 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.