Retevis RB648 Walkie Talkies for Adults, Heavy Duty 2 Way Radio with 6 Way Charger, IP67 Waterproof, Shock Resistant, 2000mAh, Rugged Walkie Talkie for Jobsites Industrials (6Pcs, Yellow) About this item Verified Toughness. The RB648 is tested to MIL-STD-810H, confirming its ability to endure shocks, dust, moisture, and extreme temperatures. Depend on it when it matters most. Rigorously tested with an 8-hour full sealing assessment, this IP67-rated two-way radio can be immersed in 1 meter of water for 30 minutes and effectively resist 0.1μm dense dust, making it durable enough for harsh environments like construction sites. Rugged and robust; PC+TPE rubber material; 360 ° impact resistance; can withstand 1000 2-meter drop; uitable for long-term use Rechargeable walkie talkie; operates in -10°C to 60°C with overvoltage and overcurrent protection;designed for industrial applications.2000mAh lithium battery for 12 hours continuous operation; supports both USB C and charging base; VOX function; activated transmission without the need to press any buttons; freeing your hand hands for other tasks; suitable for different work needs Power saving function; the walkie-talkie will automatically enter power saving mode if there is no voice reception within 10 seconds; allows it to standby up to 48 hours Advanced user-friendly design; double PTT buttons make it easy to use even when wearing gloves; LCD display easy to view; bright yellow design for high visibility