Powered by a built-in 3.7V 600mAh lithium battery, which cannot be disassembled. The instrument has its own charging circuit and has clear undervoltage and charging indications Accurate Measurement: Equipped with precision technology, the Laser Distance Meter provides quick and accurate measurements for distances, areas, and volumes, ideal for both professional and home use Multi-functional: This versatile tool features multiple measurement modes including single-distance measurement, continuous measurement, and Pythagorean measurement, making it perfect for a wide range of applications User-Friendly Design: Designed with a large LCD display and simple control buttons, this rangefinder offers a user-friendly interface that makes it easy to operate. The compact design allows for easy portability, fitting comfortably in hand or in your toolbag Screen:2.2 inch black and white screen Laser level:Class II Laser type:630-670nm, Less than 1mW Ranging battery working time:5500 times (single measurement) Number of stored records:100 pens Automatically cut off laser:20 seconds (single measurement) Automatic shutdown:150 seconds Measuring distance range:0.05-100m Distance measurement accuracy:+(2mm+dx1/10000) indoor standard reflective Inclination measurement range:90 Angular accuracy:1 (The product appearance and printed words depending on batch, but this does not affect use) Color: As Shown Material: ABS Package Contents: 1 * Digital Rangefinder Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.