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