It is a digital angle measuring device whose read is easier and exact than other scale indicated angle level. It is mainly intended for applications which involve lineation for woodworkers, measure and definition of the exact angles such as trays, sloping roofs and handrails. It also can be used as spirit level to quickly measure the horizontal and vertical angle(NOTE:It is not a digital level). Easily readable LCD Display shows the exact angle at once. Automatically shut off after five minutes to prolong the batteries life. Backlight design: keep its normal use on dark light. Data holding function: Help the use on dark light. Horizontal level Vertical level Hole to hang the digital angle level Increase/decrease angle:0.1° Measuring range:0-225° Measuring precision:±0.5° Working temperature:-10°C-+50°C Operating procedure: 1. MEASURE ANGLES FUNCTION 1) Switch on SK99G. 2) Unfold the arm of ST99G, the opening angle increases or decreases on LCD display 3) Adopt the comparative to measure the angle or set the lineation angle. 4) You can fasten the Lock Button to keep the angle invariable when drawing the angle line. 5) Open the backlight when is dark. 2. Spirit level Function: Quickly measure the horizontal and vertical degree. CAUTION: 1. Do not move the screws and components at random. 2. Please handle your angle meter with care, use even strength to rotate the Rotate Arm, and do not use too much strength. 3. Don't keep the backlight open for a long time. 4. When the low power Alarm appears on the display, please change the batteries Note:Due to different production batches, the label words on the product are random and cannot be specified. The actual product may have slight differences or color differences. This doesnot affect the applicability. Colour:Silver Material:Aluminum alloy Size:Length:400mm Package Contents: 1 * Digital Angle Finder Only the above package content, other products are not included. Note: Light reflection 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.