... 007B Major characteristic High sensitivity, scope adjustable A large range of detecting frequency Alarming with sound or optic, simple operation, ... convenient using, accurate and security. A good compatibility of electromagnetic. Small volume, easy takingMain TX Frequency: 800-1000MHz; 1800 ... instructionPower: 9V laminated battery Volume: 120*62*22mmplastic shell. gsm spy bug TG 007B