- Split-spectrum sensor technology - Test and hush features in one single button - Loud sound output over 85 dB(A) at 3 meters - Low quiescent current consumption - Surface-mount device (SMD) circuit board design - Low battery warning signal - Battery Life: 10 year, 3V CR123A lithium battery (replaceable) - TÜV and CE listed, EN 14604:2005+AC:2008