High-performance 3-electrode pinless micro sensor with fast response time. IP67 water-proof and dust resistant. Loud, 95 dB audible alarm, bright red flashing visible LEDs and internal vibration alarm. Size: 3.4 x 2.2 x 0.8 inches. Weight: 3.5 oz. Battery: user-replaceable 2/3 AA high-capacity lithium. Data logging: 10 events. Response time: T90 < 12 seconds. Extended operating temperature of -4° ~ 140° F (-20° ~ +60° C) with full T4 approval.