this series of modules can achieve the same function as self-locking switch by flicking the switch to turn on the power and then it to turn off the power, MAX can support switching loads of 10A current, and its power consumption is low under the shutdown state. The excellent performance of the module covers most of the DC loads required by the operating voltage and current, small size design not take up too much space in your equipment, for the key part if you want to use other styles of keys, you can also through the wire to connect other styles of light touch keys to our switch control board. Model: Low Power Consumption Version(XL-10AL) Operating voltage: Low power version: 3.5-5.4V Low power version:300na(5V voltage measurement); Static Power Consumption:(Sample test has deviation but not much) Load current: Low power version: 10A (5V voltage test for 30 mins); Voltage drop Low power version:130mv(5V 10A measurement); note:1, about the load current, low-power version of the 5V can run long, it be very hot, but in the room temperature of 25 under the condition of 30 minutes running test, less than 4V voltage is not recommended to run 10A high current, low voltage heating be big and easy to burn the module. 2, small current module input voltage is basically equal to the output voltage, 10A high current MAX up to 170mv, it is difficult to avoid, so you have to accept this phenomenon. 3, module use, please do not use your hands or other electrostatic or small resistance objects at the same time contact with the module input and output ports, which cause the module's work is not stable. 4,About the external connection of your own keypad, you can refer to the following figure to connect your connection cable to your keypad. Color: Blue & Black Material: PCB Package Contents: 1 x One-button switch module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.