This gas detector will complete its automatic calibration in 30 seconds and detect gasses & alarms within 0.5-3 seconds. It features an audible alert and five red LEDs (visual) increase with gas concentration. The price drops from $22.99 to $17.24 when you clip the 5% off on-page coupon and apply the code "C6W7AX67" at checkout. Shipping is free for prime members or on orders over $35.

Clip the 5% off on-page coupon and apply the code at checkout.