G504, The GPS signal repeater, is mainly used to receive the outside GPS satellite signal into the car and make the equipment work for ample of GPS signal. It’s made up of reception antenna out of the car and the transmitting antenna in the car.

NOTES
1、 The sucker could be used on the mid-upward side of the window.
2、 The reception antenna is to be adsorbed on the top of the car while the transmitting antenna is adsorbed on the iron sucker.
3、 Switch on the plug at the cigar lighter-socket. Then you can receive the GPS signal with the handset.
4、 Do not to put the R and T antenna close together and 3 meter is necessary between them without hinder.