Due to different product batches, the appearance may be different, which does not affect use. Colour:Black<br><br>Server parameter setting SMS command: Command:SERVER,0,154.23.114.25,8011,0# APN Setting SMS command: Command 1: APN,APN information,,# For example:APN,internet4gd.gdsp,,# egg:internet4gd.gdsp is apn information.No user name no password. Command 2: APN,APN information,user name,password# For example:APN,cmnet,internet,cmnet# egg:cmnetis apn information.internet is user name.cmnet is password. Relay Remote Contorl for Cut Oil SMS command: When you find the car was stolen, you can send sms command to cut the oil and electricity. Command to cut oil:Relay,1# Command to recover oil:Relay,0# Material:Plastic+Metal<br><br>Package Contents: 3 * GPS Tracker 3 * relay<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.