Sell MD-S1 hand held metal detector

MD-S1 hand held metal detector
Power: 9v(6F22)
Working frequency: 22khz
Working electric current: <50Ma
Working voltage: 7v-9v
Indicator: Visual: Red/Green LED;
Sound: Speaker or Earphone (earphone not included)
Control: On/Off Switch;
Lows sensitivity Switch Sensitivity Adjuster
High sensitivity: 15mm at Pin;