Features: Stay Connected Anytime: The 4G Full Network-GPS Pendant G53 (Battery) is the perfect way to stay connected with your loved ones at all times, thanks to its SOS-emergency phone call feature. Durable and Reliable: Made of high-quality plastic material, this pendant is designed to withstand harsh weather conditions and is IP67 waterproof rated-for added durability. Ideal-for Elderly and Kids: This device is perfect for elderly people who need-emergency assistance or kids who might get lost in crowded-places. Perfect for Outdoor Activities: Whether you're hiking, camping, or just enjoying-a day out, this pendant GPS tracking feature ensures that you can always-find your way back-home. Peace of Mind: With the 4G Full Network-GPS Pendant G53 (Battery), you'll have peace of mind knowing that you can-always contact your loved ones in case-of an-emergency, no matter where-you are. Specifications: Material:Plastic Diameter:Approx.4.8cm/1.88inch 2G+4G, supporting 2G+4G frequency-band. 750mA battery IP67 waterproof SOS-emergency call for help Sensor: 3D G-Sensor GPS positioning accuracy: within 10m. WIFI positioning accuracy: within 50 meters Network-positioning accuracy: 50-200m (depending on network-conditions) 4G antenna: PIFA-antenna Standby time: determined by battery capacity and connection mode. Working voltage: 3.5-4.2V (3.4V low-voltage automatic shutdown) Charging current: charging 5V 500mAh (current can be set according to different battery capacity). GPS antenna: external passive high-performance 15X15 ceramic antenna. Package Includes: 1x GPS Tracker note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.