Ravine is built to MIL-STD-810G for being resistant to conditions of
water, shock, dust, immersion, vibration, salt fog, humidity, solar
radiation, altitude, and low and high temperatures
Image from: Casio G’zOne Ravine Review
The new Casio G’zOne Ravine C751 is a traditional flip-phone in appearance that replaces the Casio Rock, though most of the features are retained, such as the good PTT quality and rugged Military design...