Wide voltage operation range, operation from 3. V to 4 V Input; Low Standby Current, the output current have the function of restricting loading and over loading protection, it will avoid the damage to the mobile phone or charger; Output Switch Current is high to 1.5 A, you can adjust the output voltage (in 5V-12V); Frequency operation is high to 1 kHz, the inside base reference voltage is precision 2%. # Interior components and the PCB mainboard are all made of SGS environment protection material.