Feature: 1. HIGH PERFORMANCE: Digital control wireless signal detector, with high sensitivity and quick response, the signal frequency measurement range is 300‑2700MHz. 2. ALARM MODES: There are 2 alarm modes, sound vibration and 6 level LED indication light, which has simple operation, high accuracy and good reliability. 3. DETECTABLE SIGNAL: The tool can detect mobile phone 2G, 3G, 4G signals and wireless devices, and can accurately locate GPS, which has less interference. 4. LESS INTERFERENCE: Filter signal interference, accurately catch and analyze the signal source, and can adjust to determine the signal direction and distance. 5. APPLICABLE SCENES: The wireless signal detector is compact and portable, ideal for bedroom, conference room, mobile phone recording software and car use. Specification: Item Type: Wireless Signal Detector Model: G728 Product Color: Black Frequency Range: 300-2700MHz Detection Dynamic Range: >73db Indication Method: 6 level LED light emitting indication, pitch changing indication Power Supply: Built in single 3.7V 190mah polymer lithium battery (with built in battery) Battery Model: 421143 Battery Capacity: 190mah Working Current: 60mA Continuous Work: 8-12 hours Detection Sensitivity: <0.03mw Detection Range: 5.8G: 15 square meter (standard 10MW) 2.4G: 10 square meter (standard 10MW) 1.2G: 10 square meter (standard 10MW) Mobile Signal 2G 3G 4G: 15 square meter. Package List: 1 x Signal Detector1 x Antenna1 x USB Charging Cable1 x User Manual