Tri Tronics G2, G3 replacement receivers with newly installed batteries. I also have chargers, some transmitters. Sport Basic transmitters and some Garmin receivers….all guaranteed and returnable. Bring your old tried and true system back to life-call for prices on other items and leave message for call back. Some are listed on Ebay where I have a 100% customer approval rating. 605-228-1351 I also buy used Tri Tronics systems if you have one that you no longer need.