Specifications:

Module property: Non-isolation buck
Rectification mode: Non-synchronous rectifier
Input voltage: 3V-40V
Output voltage: 1.3V-35V
Output current: Rated current is 2A,maximum 3A(Additional heatsink is required)
Conversion efficiency: 92%( highest )
Switching frequency: 65KHz
Output ripple: 30mV( maximum )
Load regulation: ±0.5%
Voltage regulation: ± 2.5%
Work temperature: -Minus 40 degrees - 85 degrees

Dimension: 43mm*21mm*14mm(L*W*G)

 NOTE: This can't be used to step up Voltage