Dc 12v 10a 120w switch power supply features: 100% newweight:338gsize: 160 x 98 x 40mm (l*w*h)input voltage: 100~240v acoutput voltage: 12v dcoutput current: 10ashell 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: 0~40 centigradestorage temperature: -20~60 centigradeambient humidity: 0~95% non-condensation in-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/led × 60leds/m=12w/m, 120w(this listing)÷12w/m=10m, so, support the led strip(60leds/m, 0.2w/led) length (max)=10m package content:1 x 12v 10a switch