XFIT Wireless Bluetooth Activity/Fitness Tracker Watch with 5 on screen Display modes for iPhone 6, 6 Plus, 5S, 5C, 5, 4S, Samsung Galaxy S5, S4, S3; iPad Mini 3,2, 1, Air 2, Air 1, iPad 3, iPad 4, iPod Touch Gen 5; Samsung Galaxy Note 2, Galaxy Tab 4 10.1" (w/ Android 4.4.2) (Turquoise) Measures your sleep quality to help you sleep better; Captures the total amount of calories burned in 24 hours and Your steps taken and distance traveled Backed with a Rebelite 30 Day 100% satisfaction guarantee. No Hassle Returns &amp; Refunds App is required to set up and record tracking history; Wirelessly sync data to app via Bluetooth and Ideal for active individuals with a keen eye on their day-to-day activity Digital screen displays live progress; Set you daily goals and track your progress; One button: 5 on-screen display modes; Keep track of steps, calories, distance, and time. Included Accessories-1 Tracker, 1 Colored Band, 1 USB Charge Cable, User Manual [Compatibility: IOS: 7 or above, IPOD / TOUCH (5TH GEN) / IPAD3 / IPAD AIR / IPAD AIR2/IPAD MINI / IPAD MINI2 / IPAD MINI3, IPHONE 4S, 5, 5s, 5C / IPHONE6 / IPHONE6 PLUS / Samsung Galaxy S6 / Galaxy S5, S4, S3, SAMSUNG GALAXY NOTE2, SAMSUNG GALAXY NOTE 10.1 & MORE!]. The strap is very durable. It is made of a very durable rubber. If they are having trouble clasping it they can put the band **WITHOUT THE TRACKER** in hot water to loosen it up. This device does not have an automatic cut off when it is fully charged. If the customer over charges the device they are killing the batteries cells which in turn will reduce the amount of time it is able to be used between charges.