Specification: *Compatible with: For Makita 18V bl1830 bl1840 bl1850 Power Tool Lithium Battery *Durable: can use many times will not broken until the battery cells dead *Main Function: Overheat , overvoltage , undervoltage , overcurrent , overcharge *Easy to use *PCB design may change due to changes in the supply chain and processing technology *Material: Copper clad laminate *Color: Green *Voltage: 18V *Size: Approx. 4.6x3.3cm *Optional: PCB Circuit Board or LED Circuit Board Package Contents: 1 x Circuit Boardonly board Note: 1. The actual color of the item may be slightly different from the picture displayed on the website, which is caused by various factors such as the brightness of the monitor and the brightness of the light. 2. Please allow for slight manual measurement deviations in the data.