iHealth HS3 Digital Scale reads and records your weight on your iPod touch, iPhone and iPad, Wireless Bluetooth technology lets you weigh in from anywhere. Easily share with doctors, friends or family. Track your progress and organize records with simple, personalized graph tools. Set target goals for weight management using the Milestone feature. Supports multiple users on multiple mobile devices so family members can share it. Max weight capacity 330lbs. Works with iHealth Digital app, free at the Apple App Store. Includes: Digital scale, free iHealth Scale App download, four AAA batteries and detailed instructions. Compatibility: The free iHealth Scale App is compatible with the following models: iPod Touch 3G/4G; iPhone 3GS/4; iPad and iPad 2. Detailed illustrated English/French instruction guide.