The longest-lasting beacon on the market. Typical battery life of 48 months transmitting every 100ms* continuously Uses four standard AA alkaline batteries (preinstalled, ready to activate) Includes secondary directional antenna Designed for indoor and outdoor use Internal on/off switch External button and LED light for battery status and configuration feedback Compatible with iBeacon™ technology (may require firmware and configuration update) Newer SDK version required - see Gimbal SDK Downloads for details Dimensions: 3.4in (l) x 3.0in (w) x 1.0in (h) (86mm x 77mm x 25mm) Full specifications are available in the Series 22 User Manual. This product is presently supported in the United States, Canada, Japan and the EU. *Fastest transmit rate permitted by the Bluetooth® Smart Note: By clicking the 'ADD TO CART' button, you are agreeing to the Gimbal Device Supply Agreement at https://manager.gimbal.com/beacon-supply-agreement .