DC-DC 3-34V to 4-35V LM2577 Boost Power Supply Step-up Module LED VoltmeterSpecification:1. Module nature: Non isolated boost module2. Input voltage: 3-34V3. Output voltage: Continuously adjustable (4-35V)4. Output current: 2.5A (MAX)5. Input current: 3A (MAX)6. Module size: 49 (mm) x 26 (mm)7. Input mode: IN+ input positive stage、 IN- input negative pole8. Output mode: OUT+ output positive stage、 OUT- output negative pole9. Adjustment mode: First、 the correct connection between the input power supply (3-34V、) and then use a meter to monitor the output voltage and adjust the potentiometer10. Output voltage: 4-35V continuously adjustablePackage includes:1 x LCD lm2577 module