Update your handheld AquaLink system quickly with the Jandy PDA Pool and Spa Combo 8-Circuit Upgrade Kit. This kit includes a PPD upgrade chip that allows you to update your system to the latest 8-Circuit pool and spa combo software. You’ll have the ability to connect and control up to eight pieces of equipment. The handheld PDA remote is user-friendly and equipped with an easy to read LCD screen for monitoring and adjusting your functions quickly. This kit includes the PPD upgrade chip, handheld PDA remote, and Jbox transceiver for complete installation.