Casio - GWF-D1000BC-1

The GWF-D1000BC-1 FROGMAN combines a black exterior and tan accents with a stainless-steel and bio-based resin composite bracelet. Its adjustable, extendable clasp provides flexibility for everyday wear and use over a wetsuit. This Master of G diving model uses a stainless-steel case, screw-lock back and anti-reflective sapphire crystal. It carries an ISO 200-metre water-resistance rating and includes depth, compass and temperature sensors. Dive logs record duration, maximum depth and minimum water temperature. Surface-interval measurement and an ascent-rate alarm complement the diving functions, while Tough Solar and Multi Band 6 support everyday timekeeping.Technical Details Model: GWF-D1000BC-1 Case dimensions (L × W × H): 59.2 × 53.3 × 18 mm Weight: 181 g Case and bezel: stainless steel/resin; DLC-treated steel Bracelet: stainless steel/bio-based resin composite Clasp: double-lock folding closure with push-button release, sliding adjustment and extension Wrist size: 150–220 mm Shock-resistant construction Water resistance: ISO 200 metres Crystal: sapphire with anti-reflective coating Screw-lock case back Power: Tough Solar rechargeable system Compass: 0–359° in 1° steps; continuous measurement for 20 seconds; graphical direction pointer; automatic level correction; figure-eight/three-point calibration and magnetic-declination correction Temperature: −10 to 60°C (14–140°F), displayed in 0.1°C (0.2°F) increments; selectable units Depth: 0–80 m (0–262.5 ft), displayed in 0.1 m (0.5 ft) increments; selectable units Dive duration: one-second increments, up to 5 hours 59 minutes 59 seconds Surface-interval measurement and ascent-rate alarm Dive log: up to 20 records containing start date/time, dive duration, maximum depth and lowest water temperature Time-stamp memory: up to 20 records with date/time and the relevant depth/temperature, compass bearing or temperature reading World time: 31 time zones, 48 cities plus UTC; daylight-saving setting Moon data: age and phase for a selected date Tide graph for a selected date/time Stopwatch: 1/100-second resolution, maximum 99:59:59.99; elapsed, split and first/second-finisher modes Countdown: one-second resolution, maximum 24 hours; start settings from one minute to 24 hours in minute/hour increments Five daily alarms, including one snooze alarm; hourly signal White Super Illuminator backlight with automatic activation, 1.5/3-second duration selection and afterglow Automatic calendar through 2099; 12/24-hour display; switchable button tones Digital display: hours, minutes, seconds, PM, month, date and weekday Battery-level indicator; display power saving in darkness Approximate runtime after a full charge: seven months of normal use without light, or 23 months in darkness with power saving enabled Accuracy without radio synchronization: ±15 seconds per month Radio synchronization: Multi Band 6; automatic reception up to six times daily (five for China), stopping after a successful reception; manual reception and latest-result display Supported time signals: DCF77, Germany (77.5 kHz); MSF, UK (60 kHz); WWVB, USA (60 kHz); JJY, Japan (40/60 kHz); BPC, China (68.5 kHz)