Test distance:Screw 2-3cm
Blade: 3-5cm
Mobile phone: 10cm or so
Fruit knife: about 15cm
Power supply: 1400mA polymer lithium battery
Working frequency: 28KHz
Stand-by current: <10mA
Working current: <80mA
Operating temperature: –10℃~65℃
Storage temperature: –10℃~70℃
Size: 360*65*40m
NOYAFA NF-511 Instruction