Two-way radios are perfect for outdoor communication with 22 channels and a 24-mile range with little obstructions. The radios are an exceptional choice for hiking, boating, hunting, fishing and more. JIS4 waterproof protection guards against light rain and splashing. Lithium polymer battery packs provide a long battery life and a fully charges in just two hours. With the dual power options, you can use either the included rechargeable batteries or four AAA batteries (sold separately). Channel scan automatically checks channels for any activity. Hi/Lo power setting lets you adjust the transmit power and conserve battery life. Silent operation turns off all of the tones for a quiet operation. Call alert notifies your group of incoming calls. Auto squelch removes annoying background noise. Keypad lock prevents accidental activation of function or mode keys.