Model; md3003b1 Power 9v(6f22) Operate frequency 22khz Operate current < 50ma Operate voltage 7v-9v Indicator Visual: red / green led sound: speaker or earphone;(earphone not included) Control On/off switch; low sensitivity switch sensitivity adjuster High sensitivity 15mm at pin; 45mm at usd 25 cent Low sensitivity Detector only respond to bigger metal Objects such as a hand gun, knife, etc. Export packing 25 pieces per carton 0.089cbm N.W 10.3kg ;g.W 16.5kg Dimension of unit 41(l) x 8.5(w) x 4.5(h)cm Weight of unit 409g Color Black Attachment for free Holster Attachment for order Rechargeable battery 25pcs/ctn Gw: 15kgs