此价格不含电池，如有需要电池，请备注！

产品说明：

功能特点：
.操作简单、设计精巧、便于保存、故障率低。
.灵敏度很轻松探测一枚大头针大小(甚至更小)金属物品。可根据现场要求调节灵敏度。
.有电池欠压指示（LED灯常亮）。
.值得称赞的是在同类款式产品中此款中挺好的。
.报警方式有声光、振动两种报警提示。
.应用场合：此款已经在中国成为是工业企业、电子数码生产企业的常规保安防盗器材。
产品参数：
.外形尺寸：长395mm*140mm
.产品重量：20个/箱、7.4公斤/箱,
.包装尺寸：52.5cmX31.6cmX37.8cm
.工作电源：6F22ND 9V电池(碱性电池、可充电电池)
.报警模式：声光、振动（开关切换）

Specifications:    
MD-300 type metal detector is a small hand-held metal detector,designed to safeguard sensitive areas like schools, courtrooms, corrections facilities, sports events, businesses,night clubs, bars and other public areas and events.When detecting metal, it sends an alarm sound and vibration, and the power supply has a low voltage indicator.The operation is simple, exquisite design, easy to save, low failure rate.    
Technique parameters:
.Power supply:9V    
.Alarm mode:Sound alarm vibration     
.Detection sensitivity:It can detect one yuan coin,the detection distance is 5 cm or more.    
.Sensitivity: Φ2.5mm Ball    
.Power consumption: 220mW    
.Current job: less than 50mA    
.Operating temperature: 0-50    
.Size:350x140x30(mm)    
.Net weight:185

   For shipping by air,so this price don't include batteries，so if needs battries,please remark when place order.thanks!