RF-V50 IP67 Waterproof 4G LTE 3G 2G GSM Elderly SOS Button Emergency Alarm GPS Tracker Features: 1. Real-time positioning: query position information and adjust positioning interval, and navigate to find personnel. 2. Historical track: View the movement track of any day within 90 days 3. Fence: GPS fence: Compare the GPS positioning data and judge whether there is an alarm for entering or leaving the fence. WIFI fence: Compare the WIFI hotspots and judge whether there is an alarm in or out of the fence. 4. Health: Calculate the amount of exercise, calorie consumption and exercise journey of people. Medicine reminder: Three different modes of medicine reminder settings: single; daily and customized; and you can record the voice of the reminder, etc. 5. Call: Dial the locator phone: two-way talk. Voice monitoring: ask the locator to call back the specified number and listen to the sounds around the wearer 6. Command setting: make relevant settings for the positioner, for example: The master number is used to receive alarm information SOS SOS phone alarm Fall Detection Sensitivity and Fall Alarm Settings Call Answering Modes: Mute, Auto and Key Answer Buzzer Sound Lookup: The locator will make a sound. It is convenient to find the target more quickly. SMS alarm switch Remote restart, shutdown or factory reset, etc. 7. Message list: Displays all alarm lists of the locator, including offline, low battery and entry and exit of the electronic fence, etc. 8. Reminder settings: Open all to receive an alarm push. Please be sure to enable the relevant push permissions in the app permissions of your phone GPS: GPS: 1. Chip model: TD1030 2. GPS signal: L1, 1575.42MHz CA code 3. Number of GPS channels: 72 channels 4. GPS chip receiving sensitivity: -163dBm, capture: -147dBm 5. GPS positioning accuracy: 5-15m 6. GPS Antenna: LDSCeramic Antenna 7. AGPS: Support 8. AGPS fast positioning time: 28 seconds for cold start 9. LBS positioning accuracy: 100-1000M (based on A