1. Multifunction Measuring Measurment optical maser distance meter, Metal / Wire Pipe Copper pipe/AC Detection 2. 1.8inch Color LCD Display with Backlight 3. Single Function buzzer alarm without datas 4. Real life voice, Real-time broadcase measurement result 5. Store up to 30 sets of measuring datas convenient record query. Large Capacity Lithium battery Support USB straight flush without worrying about replacing the battery Technical Details 1. Maximum Detection depth: Ferrous metals:100mm / Non-ferrous(copper): 80mm / Copper wire(4 greater or equal to mm2): 40mm / Foreign body (Wooden battern) 20mm/38mm 2. Operating humidity range: Metal model: 0-85%RH / Foreign body: 0-60%RH optical maser Ranging Parameter Accuracy of measurement: +/- 5mm Unit Selection: m/in/ft Measuring range(no reflector): 0.05-40m Measuring time: 0.3-4 seconds optical maser type: 620-670nm, less than 1mw Self-closing optical maser: 20 seconds Store data: 30 set of data Automatick shutdown time: about 5 minutes Screen: 1.8inch Color Screen Power supply: Buit in 300mAh Lithium battery Operation temperature: 0-40C Storage temperature range: -20-60C Type: MK2101D Colour: Black + Yellow Material: ABS + Electronic Components Size: 135 x 60 x 25mm Package Contents: 1 x wall detector 1 x USB cable 1 x lanyard 1 x English manual Only the above package content, other products are not included. Note: Light 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.