Military-Grade Durability-Built to Survive the Harshest ConditionsTested to MIL-STD-810H, RB48 shrugs off drops, dust, vibration, heat, cold, and everyday abuse. Its engineered for frontline reliability ^^ Advanced Triple ProofIP67 waterproof and dustproof; against 0.1 m dense dust; 2 meters drop-proof; passed 1000 2 meter drops without breaking; designed for harsh conditions ^^ Long Range Communicationup to 300, 000 sq. ft. /25 floors of long distance signal range; provide stable and clear transmission ^^ Rechargeable Walkie Talkie2000mAh battery; provides up to 20 hours of battery life; USB-C charging and charge station; meet various charging methods ^^ Ready Out of the Boxbright yellow design; high visibility; optional roger beep confirms the completion of the user's transmission; silicone button covers for harsh climates and wet environments