12v Class 2 UL Listed Triac dimmable power supply. Choose 30w or 60w. Compatible with most AC wall dimmer including Lutron, Leviton and most other household dimmers. Can be used for many LED lights and other applications. Requires no minimum load and it is very quiet without any buzz or humming noise. Warning: Do not overload. Overload will cause the AC adapter to fail. We are not responsible for the misuse of the power supply. It is recommended not to exceed 80% of power supply capacity. Please calculate your load before connecting the power. Specification: Class 2 Power unit Output Frequency: 50/60HZ Output Voltage: 12V Input Voltage: 100V-277V Wattage: 30w or 60w (base on selection) Size dimension: 6.1" x 2.11" x 0.8" Weight: 11oz NON-waterproof use for indoor dry location only. NON-waterproof use for indoor Dry location only. Package content: 1 Piece UL Listed 12V DC dimmable Power Supply (Choose 30w or 60w)