Features: _x000D_ Input voltage DC 0.9 ~ 6V, output DC 3.3V(5%) _x000D_ The maximum input voltage can not exceed 6.5V _x000D_ Auto Buck-Boost Converter Module working frequency 1MHZ.efficiency 61%-85% . _x000D_ Operating temperature range : -25~+85 Degrees Celsius _x000D_ Storage temperature range : -45~+125 Degrees Celsius _x000D_ 2.54mm pin pitch,MCU Development Board Breadboard friendly. _x000D_ Applications :Battery powered equipment,Breadboard Power Supply,ARM FPGA CPLD MCU Development board,electrical tools,Small power motors,Camera, Video camera,Toy car power bank ,LED Lighting,Wireless communication equipment,Audio equipment _x000D_ _x000D_ _x000D_ Specification: _x000D_ Input voltage DC 0.9 ~ 6V _x000D_ Output: DC 3.3V(5%) _x000D_ Operating temperature range : -25~+85 _x000D_ Storage temperature range : -45~+125 _x000D_ Weight: Approx.3g/0.1oz _x000D_ _x000D_ Package list: _x000D_ 1 x Step UP&Down Converter _x000D_ _x000D_ _x000D_ Attention : _x000D_ _x000D_ This is a DC-DC voltage converter module,Must be noted when using: _x000D_ 1 Input voltage can not be greater than the maximum input range_x000D_ 2 Output power can not be greater than the maximum load for a long time_x000D_ 3 Input power must be greater than the output power, because the power consumption of the module itself _x000D_ _x000D_ Q & A: _x000D_ Q : Why output voltage is less than the nominal voltage _x000D_ A : Input power supply power is too low.Test the input voltage with a multimeter,a t this time of the input voltage is very low