Powered by a rechargeable lithium-ion battery (included) with an electromagnetic induction charger (included), MTMs limited-edition Special Ops Black Silencer Steel Watch operates for as long as four months when delivering just one beeper alert, one vibration alert and no more than 20 seconds of LED lighting per day. Its digital LED module provides the wearer with the current time, as well as alternative time zone times, current month and date, four daily alarm settings, countdown timer, chronograph and your choice of alarm or vibrating alarm notifications. Plus, the multi-mode lighting system includes an internal dial light, plus external flashlight and strobe modes. The rugged case is crafted from solid 316L steel with a black DLC-coated finish and encases a multi-layered, anti-reflective and scratch-resistant crystal face with a stainless steel bezel, embossed composite dial and superluminova-coated hands and indexes. This watch also boasts proprietary quartz movement, screw-down, locking crown and case back, overcharge protection and low-battery alerts. Each comes individually numbered to signify it being a limited edition piece. Remains water resistant to 100 meters. Manufacturers three-year warranty. Case dia: 44.5mm. Wt: 9.4 oz. Color: Black. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Digital/Analog Watches.