The Chipolo is a Bluetooth 4.0 enabled device that you can attach to items that you may misplace and using the Chipolo iOS, Android or Windows Phone application to find within the Bluetooth range of approximately 200 feet/60 meters. If any Chipolo Network community member walks past your things, you will automatically see a location update on the app. You will also receive an email notification as soon as your item is spotted.As the Chipolo Network community grows, this essentially makes the range, to help find your items, limitless. the Chipolo batteries lasts up to 6 months after activation with the Chipolo app. When that period is almost up, the Chipolo app will remind you to order a new battery. With every new Chipolo Box there is an extra battery, so you're set for one year. dimensions : Diameter: 35 mm (1.37 inches), Thickness: 5 mm (0.2 inches) Delivery time: -Saturday to Wednesday: Next day delivery if ordered by 2 p.m. Delivery in 2 days if ordered after 2 p.m. -Thursday: Orders before 4 p.m. Will be delivered the following Saturday. After 4 p.m. Will be delivered the following Sunday. -Friday: No deliveries, any order placed on Friday will be delivered the following Sunday. -Same day delivery option available on weekdays when ordered before 4p.m. Delivers within 4 to 5 hours. Depending on stock availability.