Usage Tips:Practical EMF Meter: for measuring the electromagnetic radiation of household appliances. Wide Application: can be apply on household appliances such as television, fan, induction cookers, etc. LCD Display with Backlight: 2-inch screen is large and easy to read, you can manual ON/OFF the backlight. Data Hold & MAX Measurement: data retention and maximum value display, one key switchable. Torch & Unit Switching: auxiliary lights up the working area in the darkness, uT/mG unit switching. Compact Design & Solid Quality: convenient for one-handed operation, and has for long time using. Electromagnetic Frequency Response Range: 5~300Hz Electromagnetic Intensity Range: 0.1~199.9mG Resolution: 0.1mG Alarm Threshold: 4.0mG Accuracy: 15% Electromagnetic Intensity Range: 0.01-19. 99uT Resolution: 0.01uT Alarm Threshold: 0.4uT Accuracy: 15% Electric Field Strength Frequency Response Range: 4Hz~3.5GHz Range of Electric Field Strength: 1~1999V/M Resolution: 1V/M Alarm Threshold: 40V/M Accuracy: 15% Temperature Range: -20~60 Accuracy: 2 Power Supply: 3 * 1.5V AAA battery (NOT included) Colour:As shown Material:plastic Package Contents: 1 x Tester 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.