... . Form by DC Operated Wireless Smoke/heat/Carbon Monoxide/Ionization Alarm ( VST-WS588I, VST-WS588IH, VST-WH588I , VST-WC588I, VST-WIS588I ... and battery tamper-resist feature7. LED operation indicator8. Extra loud alarm sound over 85 dB9. Low-battery and battery missing warning ... indicator10. Auto-reset when smoke clears11. CE, BSI, TUV, SAI Global ...