Humminbird IDMK H7R2 In-Dash Mounting Kit f/HELIX 7 G4 [740200-1] Brand_Ancor Frequency Response Range: 250Hz -

Frequency Response Range: 250Hz - 15kHz

and it can also handle a mixture of air and water without difficulty

Grounds directly to security input

Maximum Hull Thickness Inches: 1-5/8

there is 16 GB of free space to maintain your custom maps

Humminbird IDMK H7R2 In-Dash Mounting Kit f/HELIX 7 G4 [740200-1] Brand_Ancor Frequency Response Range: 250Hz -IDMK H7R2 In Dash Mounting Kit for HELIX 7 G4 The IDMK H7R2 is a rigid and reinforced in dash mounting kit for HELIX 7 Series fish finders, complete with bracket and hardware. This provides a secure and finished look for the in dash mounting of your Humminbird fishfinder. Compatible with: HELIX 7 G4 and G4N models In the Box: Mounting kit Mounting hardware *Sold as an Individual Specifications: Type: Mounting Brackets Box Dimensions: 3"H x 7"W x 12"L