4 in 1 GPS/GSM Tracker + GPS Logger with 4GB SD Card + GSM Home Alarm+Remote Voice Bug Monitor Tracker online mode with SIM card, no any more data lost with large memory buffer when the device lost GSM connection, then automatic upload to the server when the GSM signal is back Logger offline mode with memory card, store the location information to memory card, it’s up to 10 years data storage with 32G byte […]