Description :   24V 5A 120W Switch Power Supply Driver For LED Light Strip 110V\/220V  This Power Supply Unit "DOES NOT" come with installation instruction， wiring cable， on\/off switch， or screws. Only Supply ONE LED Strip. Professional installation of qualified electrician is highly recommended. IN-DOOR USE ONLY.  Specification :    Input Voltage : 200V - 240V\/100V - 120V ±20%. 24V 5A 120W Switch Power Supply Driver For LED Light Strip 110V\/220Vutput Voltage : 24V DC. Output Current : 0 - 5.0A. Shell Material : Metal case \/ Aluminum base. Protection : Shortage Protection， Overload Protection， Over Voltage Protection. Widely used in Industrial automation， LED display， communications， etc.  Safety Compliance : CCC\/ FCC \/ CE. Working Temperature : 0 - 40\u2103. Storage Temperature : -20 - 60\u2103. Ambient Humidity : 0 - 95% Non-Condensation.   How to calculate Support max LED Strip Length :  Assumption : Your LED Strip 60LEDs\/m， and each LED 0.2W， then calculate max LED Strip Length : 0.2W\/LED × 60LEDs\/m=12W\/m， 60W(this listing)÷12W\/m=5m， So， Support the LED Strip(60LEDs\/m， 0.2W\/LED) Length (Max)=5M. Size : 22cm x 9.9cm x 4.2cm - 8.66inch x 3.9inch x 1.65inch.  Package included :   1 x Switch power supply driver for LED Strip light