TaylorSense is a smart battery box equipped with sensing technology that monitors your Taylor guitar’s humidity, temperature, battery life, and impact incidents. The battery box replaces an existing battery box on Taylor guitars featuring any of the following onboard pickups with a 9V battery: Expression System® 1 or 2, ES-T, or ES-N. In addition to tracking the guitar’s condition, TaylorSense sends alerts when the guitar needs care via Bluetooth between the smart battery box and the free Taylor Guitars App for iOS (currently available in Apple’s App Store for iPhone and iPod Touch only). The timely alerts include links to easy-to-follow videos created by Taylor’s expert Customer Service team that show you how to solve problems when they arise. Hardware/software requirements include a Wi-Fi or cellular-connected iPhone 5 or later, iPod 6th generation or later, running iOS 8 or later. Installing the battery box is easy thanks to simple instructions, or you can have an authorized Taylor service technician do it. Not sure whether you have a compatible Taylor pickup in your guitar? Consult this PDF. For more on TaylorSense and the Taylor Guitars App, visit our TaylorSense page. Model #84800.