[Product Information] Brand: Materials: glass [Product Description] ・WVA-M630D-1A4AJF: Size (H x W x D) / Mass: 45.1 x 42.1 x 11 mm / 91.2 g Length adjustment width (arm circumference): 150 mm to 205 mm ・5 ATM waterproof tough solar (solar charging system) radio solar watch ・DQD-805J-8JF Body size: (approx.) height 8.2 x width 7.8 x depth 4.9cm Body weight: (approx.) 135g ・Function: Radio reception function (automatic reception/manual reception), radio reception ON/OFF function, temperature display, humidity display, electronic alarm, snooze function, calendar display, LED light (with afterglow function), 12/24 hour display switching Power source: AA manganese batteries x 2 *According to Amazon regulations, the brand name of the set product is registered as a non-brand product. Please rest assured that the product is an officially distributed product from the manufacturer. explanation ★WVA-M630D-1A4AJF　●Case/bezel material: Resin/stainless steel●Metal band (stainless steel) ●One-push three-fold buckle ●Neobrite ●Resin glass ●Waterproof to 5 ATM ●Tough solar (solar charging system) ● Radio reception function: automatic reception (up to 6 times/day) (up to 5 times/day for Chinese radio waves) / manual reception, Reception radio waves: JJY, frequency: 40kHz / 60kHz (model compatible with both Fukushima and Kyushu stations) Received radio wave: WWVB, frequency: 60kHz Received radio wave: MSF/DCF77, frequency: 60kHz/77.5kHz Received radio wave: BPC, frequency: 68.5kHz *If you set the home time setting to a receivable city, you will receive stations tailored to the city. Please note that the time difference is set depending on the selected city. ●World Time: Time display in 29 cities around the world (29 time zones, with summer time setting function) + UTC (Coordinated Universal Time) ●Stopwatch (1/100 second, 60 minute meter) ●Timer (set unit: 1 minute, maximum set: 100 minutes, measured in 1 second increments) ●5 time alarms/time signal ●Battery indicator display ●Power saving function (turns off the display after a certain period of time in dark places and stops the hands to save power) ●Full automatic calendar ●12/24 hour display switching ●Operation sound ON/OFF switching function ●3 display switching patterns (date/day of the week, seconds, time), multilingual day of the week display (5 languages: Japanese/English/German/Spanish/Chinese) ●LED light (with afterglow function) ●Driving time without solar power generation from full charge When using function: Approximately 4 months When in power saving state: Approximately 22 months ●Home time city (cities with reception function)/Received radio waves Tokyo/Japanese standard radio waves JJY40/JJY60 (Honolulu), (Anchorage), Los Angeles, Denver, Chicago, New York/American standard radio waves WWVB London, Paris, Athens/UK standard radio wave MSF, German standard radio wave DCF77, Hong Kong/China standard radio wave BPC * Cities in parentheses may...