Features:Conversion level range: 1.8V-6VModule size: 27mm X 26.5mmUsing method:VCCA connect to 3.3V power supplyVCCB connected to 5V power supplyGND negative one, two power supply common groundAx input 3.3V TTL level,Bx will output 5V TTL levelAx input 5V TTL level,Bx will output 3.3V TTL levelPackage included:1 x Logic Level Converter SV1414303