Wireless Animal Tracking GPS Shock Collar for Dogs One Drive Two VHF/4G Transceiver Dog Collar with Tracker. Multi-Mode Positioning: Supports GPS, GNSS, GALILEO, and BDS for precise global tracking. Long-Range VHF: 15km VHF range with capability to track up to 20 dogs simultaneously. IP68 Waterproof Rating: Fully waterproof and dustproof for durability in harsh environments. Extended Battery Life: 7000mAh battery provides up to 20 days of standby time. OEM/ODM Customization: Full customization available from samples and designs with fast turnaround. Multi-Function Training: Features 10 levels of shock, vibration, bark detection, and LED light. Two-Way Communication: Includes two-way calling capability for real-time interaction. Offline Map Support: Enables tracking and navigation without internet connectivity.