This is an excellent quality ETL Listed 24v 2.1A 50w Triac dimmable power supply. 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 quite without any buzz or humming noise. warning: Do not overload. Overload will cause the AC adapter to fail. we are not responsible for misuse of power supply.It is recommended not to exceed 80% or 40w of AC adapter''s capacity. Please calculate your load before connecting the power.Specification:Output Frequency: 50/60HZ Output Current: 2.1A Output Voltage: 24V Input Voltage: 100V-130V Size dimension: 7" x 2.5" x 1" NON-waterproof use for indoor dry location only. NON-waterproof use for indoor dry location only. Package content:1 Piece ETL Listed 24V DC 2.1A dimmable Power Supply