Casio - G-Shock - Aviation series - GW2500B-1A - Introducing the Aviation series of timepieces designed to recreate the feel of aviation instruments. The functional, analog-digital combination dial looks like advanced instruments found in today's modern aircraft. Large Arabic numerals at the 12 and 6 o'clock positions combine with sharply pointed hands and luminous material is used at strategic positions on the dial for easy reading in dark conditions. Solar Atomic Timekeeping and the combination of stainless steel and resin, which contribute to an elegant appearance and lighter weight, make these models the prefect combination of performance and great looks. Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China) - Tough Solar Power - Shock Resistant - 200M Water Resistant - Full Auto LED Light with Afterglow - Neo-brite luminous hands and markers - World Time - 4 Daily alarms and 1 Snooze Alarm - Hourly time signal - 1/100 second stopwatch - Full auto-calendar (pre-programmed until the year 2099) - 12/24 hour formats - Accuracy: +/- 15 seconds per month - Storage battery: Solar rechargeable battery - Battery power indicator - Power saving function - Size of case / total weight: GW2500B 47.0 x 46.9 x 15.8mm / 66g