12v 3.2a 40w Switch Power Supply Driver Transformer for Led Light Strip 110-220v

Size: 11 x 7.7 x 3.6cmInput Voltage: 110V/220V 15%Output Voltage: 12V DCOutput Current: 0~3.2AShell Material: Metal case / Aluminum baseProtection: Shortage Protection, Overload Protection, Over Voltage ProtectionWidely used in Industrial automation, LED display, communications, etc.Safety Compliance: CCC/ FCC / CEWorking Temperature: 0~40Storage Temperature: -20~60Ambient Humidity: 0~95% Non-CondensationOnly Supply ONE LED StripIN-DOOR USE ONLY This Power Supply Unit "DOES NOT" come with installation instruction, wiring cable, on/off switch, or screws. Professional installation of qualified electrician is highly recommended.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/LED60LEDs/m=12W/m, 40W(this listing)12W/m=3.33m, So, Support the LED Strip(60LEDs/m, 0.2W/LED) Length (Max)=3.33M Material: copper and aluminum wire resistive, panels, dashboard, copper and iron boardPackage included :1x Switch Power Supply Driver for LED Strip lightNote:Light shooting 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.