Sonar Flexible Arm 2.0 - mounting bracket for boats and kayaks. Convert your boat, kayak or flotation ring into a high-tech sonar system. Attach the Deeper sonar (3.0, PRO or PRO+), attach the flexible arm to the vessel and troll the sonar to create incredible maps or locate targets. Wave-adaptive model: Once installed, the new Flex Arm 2.0 can be adjusted up to 20 cm. The sonar always stays on the surface of the water, which ensures a constant connection to the smartphone. Snappy attachment: The mounting bracket stays firmly in place with the new G-Clamp attachment. It can be securely attached to any part of the vessel up to 70 mm thick. Extended Arm: The new 79 cm long Flex Arm 2.0 can be positioned in a number of ways, making it suitable for many different vessels.