ITEM NAME:3V To 5V 0.7A USB Charger For MP4 MP3 Phone DC-DC Converter Boost Boos FEX Descriptio n Specifications: Material: PCB Color: As Pictures Show Size: 2.89*1.88*0.85cm Module Nature: Non-Isolated Boost Module (BOOST) Input Voltage: 1-5V Input Voltage Must Be Less Than The Output Voltage Output Voltage: 5.1-5.2V Output Current: Rated 0.5A-0.7A (Single-Cell Lithium Battery Input), Maximum 0.7A (Single-Cell Lithium Battery Input) Conversion Efficiency: Input Lithium Battery Efficiency Is Generally 85-90% Switching Frequency: 500KHz Output Ripple: 200mV (MAX) 20M Bandwidth (Input 4V Output 5.1V 1A) Undervoltage Indication: LED With Load LED Is On (Input Voltage Is Lower Than 2.7V LED Is Off) Working Temperature: Main Control Chip Industrial Grade Full Load Temperature Rise: 30-40 Â °C Quiescent Current: 100uA Load Adjustment Rate: Â ±1% Voltage Regulation Rate: Â ±0.5% Dynamic Response Speed: 5% 200uS Short Circuit Protection: None, If You Want To Have Short Circuit Protection, You Can Input The Lithium Battery Protection Board Or Use A Protected Lithium Battery. Input Reverse Connection Protection: None, If Reverse Protection Is Required, Please Use Our Reverse Protection Board. Wiring Method: Welding Input Mode: IN+ Input Positive Level, IN- Input Negative OUT Output, Or USB Output Package Included: 1 * Step Up Boost Module Honesty is gold for all! 3V to 5V 0.7A USB Charger For MP4 MP3 Phone DC-DC Converter Step Up Boost Module