1.Aluminum shell material: efficient heat dissipation 2. Input voltage,Toggle switch 3. Overvoltage protection, overload protection, short circuit protection 4. Pure copper transformer: brand new device, pure copper transformer, good anti-interference, low working temperature, low noise, long service life colour:Silver Material:aluminum size:215*115*50mm Package Contents: 1 * Switch Power Supply Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.