The few knobs and buttons are generously sized for easy operation and are designed to provide non-slip, positive action — even while wearing gloves. The built-in bridge-tied load (BTL) amplifier offers powerful 800mW* audio output from the large 45mm speaker. The radio delivers loud and intelligible audio even in noisy environments. A new high efficiency FET of the IC-F3001 series reduces consumption current and provides 20 hours* of operating time with the BP-265, 2000mAh battery pack. Even when used with the BP-264, the radio offers 14* hours of operating time. While the radio is a compact unit with a height of only 111mm (43⁄8 inch), the radio is tested to dust protection and water resistant equivalent to IP54 and 11 categories of MIL-STD-810 environmental test. In short, the IC-F3001 series is built rugged!