Usage Tips:Accurate stylus gauge for stylus force measurement. Large LCD screen, easy to read With blue backlight, convenient to use in a dark Automatically power off when there is no operation for 3 minutes. High precision, high sensitivity Accurate stylus force is important for ensuring the playback result and life of your valuable records and cartridge. Too high stylus force results in shortened record/stylus life while; too low stylus force results in easy mis . Both too high stylus force and too low stylus force result in poor audio performance. So you need a accurate stylus gauge to measure your stylus force. Measurement range:0-5.00g ( display 3 digit ) Accuracy:±0.01g Unit:g/oz/ozt/dwt(tl)/ct/gn Power Suplly:2 x 1.5V lithium cell Ag12(Not included batteries) Stainless steel weighing area:Nonmagnetic Colour:Gray Material:ABS Size:96x43x20mm/3.8x1.7x0.8in Package Contents: 1 x Stylus Force Gauge 1 x Calibration weight 1 x Leather case 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.