Features:✪ Power : 6F22 battery (9V)or adaptor✪ High : decibel alarm : More than 100dB✪ Material: ABS Plastic✪ long extension cable : 1.5m✪ Operating Temperature : 0 to 50℃(32F~122F)📐 Size : 12 x 6 x 5 cm (or) 4.7 x 2.4 x 2 inches
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