Citizen Promaster PMP56-3051 is a chronographthat bears a titanium case and a black rotatable bezel with 60-minute calibration. The 40mm Citizen Promaster has a grey dial with thick luminous hands and white calibrations and red accents. Citizen Promaster PMP56-3051 has a rotatable bezel designed like that of deep-sea dive watches but with a reverse rotation prevention mechanism to prevent unwanted rotating. Promaster PMP56-3051 has a Photovoltaic Eco-Drive quartz movement that can reserve power for up to 6 months after a full recharge. Similar to the rest of Eco-Drive Citizen watches, the Japanese provides its wearer with multiple precision like alarm, perpetual calendar, and auto/ manual reception. Citizen Promaster PMP56-3051, however, is exclusively shockproof and with chronograph functions of 1/20 sec. – 60min.