The M73 Series successfully builds upon the existing M72 radio platform. Loud 700mW audio output. With an interface design with large directional buttons, you gain fast access to menu items and radio functions. Compact, slim and ergonomic design allows easy one-handed operation. Rigorously tested for durability, it meets MIL-STD 810 specifications. Includes: Battery charger, AC adapter, cigarette lighter cable, belt clip and hand strap. Aluminum chassis with backlit buttons. Priority, Tag, Dual-and Tri-watch scanning. AquaQuake water draining function. Weather Alert. Lithium-ion batteries. 18 Hour typical battery life. IPx8 Submersible plus. 2 1/8 x 5 x 1 3/16 , 9 oz. 3-Year waterproof warrantyM73PLUS also features: Active noise cancelling to reduce background noise to hear conversations better. Bass boost function provides a rich bass sound for both transmit and receive signals. Last call voice recording automatically saves the last incoming call for one minute. You can also start recording manually. Quality marine product. Limited warranty.