Casio G Shock Mens Rubber Strap Green Analogue & Digital Watch GA B010 3ADR white leather Press the LED light button Size:U Press the LED light button to reproduce the blinking light effect when the demogorgon surfaces and reveal the title printed upside down this watch is sure to keep up with your lifestyle Smartphone connection application connection function Smartphone Connectivity Mobile Link (uses Bluetooth® wireless connection) app CASIO WATCHES Application Connectivity Automatic time adjustment Simple watch settings World time for approximately 300 cities Life log data Application Information Time and place Find phone functions NCC Type Approval Number CCAQ25LP0630T1 shell glass material Mineral glass Compatible watch strap sizes 145 to 215 mm other glow in the dark Watch functions World Time World time with 38 time zones (55 cities + UTC) Battery level display warning Battery power indicator Battery life Approximate battery life: 5 months with rechargeable batteries (based on normal operation time after a full charge without exposure to light) 26 months with rechargeable batteries (based on operation time after a full charge in complete darkness with "power saving function" enabled) accuracy Accuracy: ±15 seconds per month (without Mobile Link feature) Other product features Pointer movement function (the pointer can be moved so you can clearly see the content on the digital display)