Product details:

•  Whole system is waterproof when the camera head is installed and the control box is closed.
  
•  On-Screen date & time stamp and distance counter.
  
• The meter counter reset button can recount the meter at any time as required.
  
•  The Meter-Feet button can switch the length unit easily. 
  
• Microphone for local audio recording, just one press on the audio button to turn on/off the audio recording.
  
•  The LED brightness control button is used pulley button without breakpoint dimming.
  
•  Wireless keyboard for text input on the real time picture or video like a laptop’s, very easy to operate.
  
• The external storage SD Card slot and USB port to store still pictures or videos
  
• The cable reel is out of the toolbox for easy cleaning and won't cause dirty in the box
  
•  Rotatable cable reel mounted in metal frame for convenient operation.
  
•  Rechargeable battery lasts up to 7.5hours continuous work(9inch DVR for 7.5hours, 13.3inch for 4hours).
  
• Suitable for pipes with inner diameter at 15mm-200mm.