Companion app for SSA/Accuwave devices. APM-2 and APM-X SPL Meters AVM-X Smart Voltmeter Get yours now from the SSA Store: http://ssaudio.com/index.php/products/electronics/ Record Basscam videos! Display real time dB SPL, compute average SPL measurements and share them with your friends. Dual sensor competition mode. Voltmeter events and notifications. Not compatible with the APM-1.