STAY AWAY! I'm not use to leave negatives but this one tops it, VERY BAD value, 2 problems: 4G Tracker doesn't respond to phone calls and GPS goes into sleep mode after an hour the car isn't moving. contacted seller and explain I need the GPS to be available all the time and it's a shock sensor issue but got ridiculous replies like: Use data instead of SMS, Connect ACC car switch wire, Don't set admin number etc. I asked refund for faulty unit 3 TIMES! but got dodging and mixed answers, SHAME!