Feature: 1. Higher positioning accuracy, using four modes of positioning, Beidou+GPS+LBS+WiFi, is more accurate than one mode of positioning. 2. Supports two‑way hands‑free intercom, after the call is connected, direct talking, built‑in clear sound quality speaker, wide pickup range. 3. After setting the electronic fence area, when the locator exceeds or returns to the fence, the locator will immediately send a message to the APP to remind you. 4. You can view the current day and historical track (3 days). The track display has two modes: list and map. The system provides automatic playback and manual viewing at the same time. 5. In monitoring mode, the locator will actively dial the preset number, the locator cannot hear the sound of the mobile phone, but the mobile phone can hear the sound of locator, without any vibration and other prompts. 6. Support setting the refresh frequency, counting in minutes, after a few minutes of setting, the locator will update the network information according to the set time. 7. After the tracker is turned on and working normally, it cannot be shut down by pressing the button, but can only be shut down and restarted remotely on the mobile APP. 8. When the monitoring phone number is bound, the locator can only accept incoming calls from the bound phone number, other phone numbers cannot dial the locator, and the phone number must be set to use the voice monitoring function. 9. Multi-function, historical track, electronic fence, voice monitoring, SMS monitoring number, GPS+LBS+Wi-Fi positioning, do not disturb mode, with SOS button and two-way voice function. Specification: Item Type: Infrared Tracker Material: ABS Purpose: Suitable for children, the elderly, and other people who need monitor positioning Voltage: 100-240V Positioning Mode: GPS+LBS base station+WIFI+Beidou Battery: 3.7V lithium battery 700mA (built-in battery) Hands-free Intercom: Support Human Body Infrared Trigger: Support Remote Shutdown/boot: Support Voice Monitoring Callback: Support APP Electronic Fence: Support Footprint Review: Support Low Battery Reminder: Support. Package List: 1 x Infrared Tracker1 x Manual1 x Plug1 x USB Cable1 x Sticker