EST-101C Handheld signal detector Detecting frequency range:100-2600MHz Detecing range :1-10m EST-101B Handheld mobile phone detector The  Function:1. It is able to prevent the crowd's personal life don't be shoot by some evil persons.2. It can be used in the commerce purpose. For example. Sign a contract, business negotiation...3. It can be used for the company, factory, government, hotel, theater, art gallery & museum Specifications: 1.Detecting frequency range:100-2600MHz 2.Working range: 10meters 3.Working voltage: 12V (built power soure) 4.Dimension: 50mm×68mm×15mm20mm×150mm×30mm 

EST-101C Handheld signal detector