Car GPS Tracker with Microphone /Sos Alarm Logistic Management (TK116). Quad Band GSM Support: Supports 850/900/1800/1900MHz for worldwide usage. Wide Voltage Input: Compatible with 6-36V DC vehicle power systems. Real-time Tracking & Playback: Tracks vehicle location and allows historical route playback via web or app. Remote Monitoring & Control: Built-in microphone for audio monitoring and relay for remote vehicle control. Comprehensive Alarm System: Includes SOS, vibration, collision, power disconnect, and low battery alarms. Long Battery Life: 200mAh built-in battery supports extended operation without external power. One Year Warranty: Covers all mechanical defects with free maintenance cost during the warranty period. Fast Delivery for Samples: Sample and mini orders delivered within 1-2 working days after payment.