Martian Watches Notifier Smartwatch - Red Compatible with select Apple and Android phones - You can use this with most Android smartphones and tablets with OS 2.3.3 or later and Apple iPhone 4S, 5, 5C and 5S, plus later versions of iPad and iPod Touch. 1.5" graphic OLED Display - See information in clear, easy-to-read detail with 96 x 16 pixels of resolution. Rechargeable Battery - Lithium-ion polymer battery can be charged with the included USB cable. Notifications - Keep up to date with caller ID, SMS, e-mails, social media posts, fitness stats, news and sports headlines and other alerts that your compatible smartphone supports. Customize vibration patterns - You'll know what kind of incoming alert you're getting without even needing to look at your watch.