Malem’s simplest bedwetting alarm Designed especially for those looking for a straightforward cure for bedwetting Ultra Lightweight and small for ease of wear Sounds & Flashing Light About 23g / .5lbs About 1.57" x 1.53" x .7" Red - Single Tone ; Camo - 8 Tones The Malem Audio Alarm is a small, ultra lightweight alarm comfortably worn on the nightwear close to the shoulder. The bedwetting alarm is connected to a clip-on moisture sensor which anchors to the outside of any close fitting underwear for boys or girls. Sensor contacts are within the clip so skin contact or sweating will not trigger the alarm. Malem alarms are well constructed and durable, with sounds that wake children. Available with a single tone (red) or 8 separate tones (camouflage) to prevent "audio accommodation" - getting used to one sound and tuning it out. The alarm sounds continuously until the sensor is removed, allowing you or your child sufficient time to effectively respond to the alarm. Included with every Malem Bedwetting Alarm are instructions for use, charts to track progress and one set of batteries. Uses 3 alkaline "button" style batteries per set (Eveready A76).