This is a sewer inspection camera that comes in a portable size. Professionally made, this inspection camera features an FM locator for easy checking. This high quality sewer inspection camera has a long lifespan.

• Underground low power receiver for sewer inspection.
• Support custom-made, accessories are interchangeable.
• FM locator: transmitter and receiver.
• Transmitter: sends 512Hz frequency.
• Receiver: receive the frequency and locate the bad pipe.
• Size: Φ22.5 x L48mm, 512 x 110 x 118.
• Power source: #357 button cell non-rechargeable.
• Power source: 6 AA alkaline.
• Battery life: 3-4 hours or 30-40 hours.
• Frequency: 512Hz.
• Tone type: beeping or continuous.
• Weight: 810g.
• Thread: metric 15mm or pitch 1 mm.
• Operating temperature: -20 to 50℃.
• Range (cast iron): up to 10ft.
• Controls: on-off, sensitivity, near, far and toggle switch.
• Range (nonmetallic): up to 15ft.
• Minimum line size: 1in.
• Output: signal strength meter, speaker, earphone and battery indicator.
• For more information: http://wopson.com/china-Underground_low_power_receiver_for_sewer_inspection-id138.html.