Name: Drill Protection Board. Applicable model: Hand drill. Material: ABS+metal. Charge Voltage: 21V. Overcharge Protection Delay: 1S. Length*Width: 6.6*2.5cm. Package Listing: 1Pc Drill Protection Board. Attention: There may be differences in wiring color, base plate color, or other aspects between the actual product and the linked image, but the functions are exactly the same.