Battery life: Approximately 5 years in standby mode, approximately 2 hours of continuous sounding (3 minutes per sound, 6 times per year) Size: Approximately 25 x 25 x 105mm Weight: Approximately 55g (including battery) Included: 1 CR2 lithium battery Recommended by the National Crime Prevention Association Federation, Recommended Number: No. 719 Color: Black A security buzzer that alerts with sound to prevent external intrusion. The alarm sounds when a window is opened! Mode: Continuous alarm Volume: Alarm/approx. 87dB (1m in front, at 2.5V) Panasonic Home 110-ban BH-212P Buzzer only for sale (the sticker in the image is not from this product's set) No price reduction, please.