... can press SOS button for emergency General: L1 1575.42MHz, C/A code, 20 Parallel Channels Sensitivity: -143 dBm minimum Accuracy ... 9V-55VEnvironmental Specification: Operation Temperature: -20ºC to +70ºC Storage Temperature:-30ºC to +85ºC Operating Humidity: 5% to 95% car gps ... , support LCD, camera, Canbus J1939, OBD II, fuel sensor CW-801