Technical Specifications: •Power Voltage:9V(6F22) standard or rechargeable battery •Power:270mW •Operate Frequency:22KHz •Operate Current:< 50mA •Operating Voltage:7V-9V •Operating temperature:-50 to +55 •Net Weight:409g •Dimension:41(L) X 8.5(W) X 4.5(H)cm •Indicator:Visual: Red / Green LED •Detecting way:Speaker or Earphone;(Earphone not included) , vibration •Control:On/Off Switch; Low sensitivity Switch Sensitivity Adjuster •Performance:The sensitivity of the detector is determined primarily by the size, shape and composition of the object to be detected. •Export Packing:25 Pieces Per Carton 0.089CBM N.W 10.3KG ;G.W