Dual geo-fence can be set with your iphone or smart phone via ble4.0 technology and gps. (working range: via ble4.0 is around 40m in open space. Via gps is unlimited.) Auto alarm system when your target or pet runs away from the geo-fence area, gps will be turned on automatically and sends an alert to your phone which will also show their location on the map. Real-time tracking giving you the ability to track your pets movement at all times. History record. Logs pets wanderings Auto power saving Low power alert send an alert to your phone when the power of the device is low. Agps quick positioning built-in u-blox max7 gps module to support fast positioning by agps in city area and by cell id even without gps signal. 880 hours long working time built-in 710ma li-polymer battery. (as long as your pet is within the geo-fence range). Ip65 waterproof rating Free app on both android & ios Package size: 57mm x 138mm x 104mm Pet-210 tracker weight 59.5g 1 pcs packing weight 175 g 1 carton 45 pcs Carton size 420mm x 290mm x 325mm N.W 10 kg G.W 9 kg