StickNFind Bluetooth Location Stickers Diameter: 0.98 Inches x Thickness 0.16 Inches (24mm x 4mm) Weight: 0.15 ounces (4.5 grams) Requires device with Bluetooth 4.0 or above (iPhone 4s/iPad Mini/iPad 3/4 /iPod Touch 5-Gen /Android Devices Range of 150 feet. Utilizes replaceable CR2016 battery that lasts for over a year.