I purchased this online about two years ago. I used it for my son's bedwetting, but he doesn't wake up to the sound, so we stopped using it. It has been used 2 or 3 times. Please note that the box and instructions are not included. ↓ Excerpt from the seller Bedwetting Detection Alarm 【Innovative Evolution】This bedwetting alarm is innovative and helps in the treatment and improvement of bedwetting, making it the best product for caring for children and the elderly who wet the bed!