This is the Surge Guard 30 Amp 44380 Surge protector, and can protect your RV against up to 2100 joules.  This is a perfect unit for travel trailers, pop-ups and any smaller type RV. 

This unit also will test for and indicate for the following:

• Open neutral
• Open ground
• Reverse polarity
• Open circuit/no power
• Missing leg 1/2 voltage
• Surge protection status
• Overheating plug/receptacle

Other features include a fully enclosed receptacle cover, increased receptacle brass thickness to reduce heat, convenient T-Pull handle, easy to read LED fault chart, and includes the anti-theft ring that is perfect for use with a cable lock. 

Great price for a great unit!

If you are in a larger RV we recommend the total electrical protection portable units by Surge Guard (Model 34931).