Voice Monitoring We can use preset SOS number to send command “MONITOR#” to our AT4 . Our AT4 GPS tracker would automatically call you back in a second. Pick up and monitor the voice inside the vehicle 2). Super Long 30 days Our AT4 have built-in chargeable and changeable 3.7V 10000mAh Li-ion battery and intelligent dormancy function. One-time charging lasts nearly 30 days( drive for 2 hours per day, in Mode 1: T1=10s, T2=3600s), no need to charge tendiously. 3). IPX5 Dust And Waterproof Our AT4 asset GPS tracker have super water-resistant to ensure stable operation in tough environment. It is not only effectively prevent dust from entering, but also don't worry about being splashed by water. 4). Tamper Alert The anti-tamper button will pop out and alert will be sen.
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