A: The flagship model comes standard with [send original 9V dry battery]
B: Flagship model with high configuration [Send original 9V charging set]
C: Voice type multifunctional measuring instrument [wall detection + ranging]

Maximum detection depth:
Magnetic metal: 12 cm
Non-magnetic metal: 10 cm
Alternating current: 5 cm
Wood: 3.8 cm
Battery type: 9V universal battery
Operating time: about 6 hours
Automatic shutdown: automatic shutdown within 5 minutes without operation

Detection depth:
Ferrous metals: 100mm
Non-ferrous metal (copper): 80mm
Alternating current: 40mm
Copper wire (≥ 4mm2): 40mm
Foreign body (- generally refers to wooden block): 20mm (EXACT/precision),38mm (DEEP/depth)
Battery type: 300mAH built-in rechargeable lithium battery
Battery life: about 5000 times in a single measurement
Automatic shutdown: automatic shutdown within 5 minutes without operation