SOS Button - Instant Alert Notification. Overspeed Alarm. 4G Support LTE-FDD:B1 B2 B3 B4 B5 B7 B8 B28. Low Battery Alert. Water-Resistance Level: IP66. 3G Support: 3G-WCDMA： B1 B2 B5 B8. Water-Resistant IP66 Structural Design.
eBay