Features 1、100% brand new and high quality. 2、This step up module can convert 3V~6V to 6V~15.5V. 3、Designed with USB connectors and output voltage is adjustable. 4、It has high conversion efficiency, usually can be 79%~90%. 5、Small size and light weight, it is convenient to use. Specification Features: 100% brand new and high quality. This step up module can convert 3V~6V to 6V~15.5V. Designed with USB connectors and output voltage is adjustable. It has high conversion efficiency, usually can be 79%~90%. Small size and light weight, it is convenient to use. Specification: Input Voltage: 3V~6V Output Voltage: 6V~15.5V Output Power: Maximum 7W Conversion Efficiency: 79%~90% Size: 56*16mm / 2.2*0.6in Weight: 7g / 0.2oz (approx.) Package list: 1 * Module Package List