Feature: 1. Good Features: Equipped with LCD, noise reduction switch (bounce to filter some noise), switch, headphone jack, charging jack and sensor jack. 2. On Screen Display Knob: Turn counterclockwise to decrease display sensitivity, and clockwise to increase display sensitivity. 3. Reliable Performance: Frequency selection switch (200‑300Hz). Volume adjustment knob. Sensor handle with switch control design, easy to use. 4. Battery Type and Host Size: Lithium ion battery, model 523412, 8.4V, capacity 1000mAh. Host size is18.5x11.3x8.5cm / 7.3x4.4x3.3in. 5. Product Parameters: The magnification is adjustable from 0‑100dB. Frequency binning 1‑4 files 200HZ‑3000HZ continuously adjustable. Working current 60mA. Specification: Item Type: Electronic Leak Detector Material: Iron Color: As Pictures Shown Weight: Approx. 6.250kg / 13.85lb Voltage: 100-240V Measurement Object: Pressurized Pipeline Battery: Lithium ion Battery, Model 523412, 8.4V Capacity 1000mah (Shipped with Built in Battery) Host Product Size: Approx. 18.5x11.3x8.5cm / 7.3x4.4x3.3in A: The magnification is adjustable from 0-100dB. B: Frequency binning 1-4 files 200HZ-3000HZ continuously adjustable. C: Working current 60mA D: Voltage 9 volts E: Operating temperature -10℃~+50℃ F: Working time > 30 hour. Package List: 1 x Water Leak Detector Host 1 x Storage Handbag1 x External Sensor2 x Indoor Sensor1 x Sensor Handle1 x Headphone1 x Charger1 x Portable Aluminum Box1 x English Manual1 x Listening Rod Note: Note: The high sensitivity sensor can only be connected in a quiet environment, and the noisy environment is easily disturbed.1 Do not put water into the instrument.2 Do not disassemble and touch the internal components at will.3 Do not vibrate strongly.4 When not in use for a long time, it should be stored in the instrument packing box.5 Turn off the power while charging to avoid damage to the instrument.