Overcharge protectionOver discharge protectionTemperature protectionThermal managementBalance functionBattery pack capacity detectionBattery internal resistance detectionType: B: with ShellColour: as shownMaterial: composite materialPackage Contents:1 * PCBA MKBMS--12S main control board1 * HY2.0 single head 10P line1 * HY2.0 single head 13P line2 * GH1.25 single head 5P cable1 * GH1.25-5P to line1 * USB cable type-C data cable1 * 2.0MM jumper cap1 * 1.3 inch OLED display LCD screen module1 * 12MM 3-6V key switch4 * M5*8 stainless steel round head screws4 * M5 copper gasket4 * 90 degree angle terminal block T90-6/5 (red copper)1 * XT30 (female)Only the above package content, other products are not included.Note: Light 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.