Co2 Laser Cutting Engraving Machine Model:6090 80W Parameter Specification Product Type COB Store in a safe Parameter Specification Product Type COB LED Dot Matrix PCB Model 2B50C 4B50C LED Technology COB (Chip on Board) LED Colour Warm White LED Configuration Dot Matrix Light Output Bright & Uniform PCB Type LED PCB Application LED Lighting Variant 2B50C 4B50C Power Supply Constant Current LED Driver Required 50W 50 LED Variant Driver 100–175V DC If you are making a e cycle battery with lithium ion battery then you need this bms board to protect your battery from over charge protection advertising Available in multiple laser power options from 60W to 150W and various working area configurations