ZAICUS ST-901 GPS Tracker Security System CAR, Bike, Truck and Bus Real time Location Tracker (GPS Without SIM (Lifetime Subscription)) Size name:GPS Without SIM (Lifetime Subscription)   3. LED Indications GPS LED Indicator Flashing (1s on, 1s off) Searching GPS signal Continuously bright GPS fix Continuously dark No GPS fix or initializing GSM LED Indicator Quick flashing GSM initializing Continuously bright Connected to Server Sucessful Continuously dark No GSM signal Power Status Flashing Power on Continuously bright Not working properly Continuously dark Power off 4.Method of installation 4.1 Preparation before installation 1)Open the packing box to check whether the type of device is correct and whether the accessories are included. 2)This product is a high-tech electronic device, installation should be undertaken by a professional. 3)Please follow the following procedures to install your GT02A.During installation, there should be no power to the device. 4.2 Installing SIM card: each GT02A need to insert a GSM SIM card. The SIM card used should be enabled for GPRS. 1) Testing SIM card: to test SIM card, please install it into a normal GSM mobile and ensure it can send and receive SMS, and enables for GPRS. 2) Installing SIM card:Remove the upper cover of device,insert SIM card as shown then replace cover,lock the Shell With 3 bolts. aeProduct.getSubject() 4.3 Selecting installation place and fixing it.There are two kinds of installation: covert and non covert. If you need the covert installation, please refer installation to an auto electrical contractor. Note: 1) To prevent theft of the GT02A,the device should be installed as covertly as possible. 2) Avoid placing the GT02A close to higher power electrical devices, such as reversing radar, anti-theft device or other vehicle communication equipment. 3) The GT02A should be fixed into position with cable ties or wide double-side tape. 4)Your device has built-in GSM antenna and GPS antenna. During installation, please make sure the receiving side face is up, with no metal object above the device to interfere with GPS reception. The following places are suggested fo