This module has short circuit protection. Widely used in DIY Mobile Power Supply, 5V output for charging Phone, MP3, MP4, , etc Input voltage: 9V/12V/24V/36V Output voltage: 5V Output current: 3A Switching frequency: 150KHZ Conversion efficiency: 92% Working temperature: -40 to +85 degree Centigrade Color: Photo Color Material: PC+ metal Size: 59mm x 21mm x 17mm Note: 1.Do not put the probe towards sunlight. Sunlight cause interference to module. 2.Sensitivity should not be regulated excessively high because high sensitivity can easily lead to false trigger. Package Included: 1 * module Only the above package content, other products are not included. Note: Light 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.