Uniden GMR2872-2CK has max range: 28 miles, battery: Rechargeable - nickel metal hydride The GMR2872-2CK is the industry's fully submersible GMRS/FRS two-way radio. Rated JIS-7, it will withstand being submerged 3 feet for 30 minutes with no damage. Plus, if you do drop it in the pool or lake, it floats! The GMR2872-2CK is also packed with all the industry-leading features you'd expect from Uniden, including direct call, call ID, auto channel change, 6,270 channel combinations, 28-mile maximum range, backlit display, and more!