Nite Train-r Wearable Alarms Have Been Redesigned To Be Even More Reliable. They Are Gender Specific And Come With Moisture Sensor Pads Which Are Uniquely Shaped To Fit Boy's Or Girl's Anatomy To Ensure Fastest Detection Of Urine And For Added Comfort. The Sensor Pads Are Strategically Placed Inside The Underwear In Order To Catch The First Drop Of Urine And Sound The Alarm At Point Of Contact. Alarm Attaches To The Shoulder Of The Child's Sleepwear Close To The Ear. This Will Then Awaken The User To Finish Eliminating In The Toilet. Each Sensor Pad Is To Be Used With Our Specially Designed Washable Mesh Covers To Help Reduce False Alarms And Add Even Greater Comfort. Our Smart Mesh Cover Program Designed For The Sensor Pads Changes The Sensitivity Of The Alarm Thereby Helping To Differentiate Between Body Sweat And Drops Of Urine. Our Sensor Pads Can Instantly Be Wiped Clean And Ready To Be Reused In Seconds. Best Of All, No Acid From Urine Can Be Trapped Anywhere Giving Our Sensor Pads An Accurate And Long Life. Each Male/female Unit Consist Of 2 Reusable Moisture Sensor Pads, 2 Mesh Covers And A Dual Volume Control Electronic Alarm Box (high Pitch Or Low Pitch Sound Options) With A 9 Volt Battery (included), Instructions For Use And A Progress Chart. Celebrating Over 40 Years Of Quality Bedwetting Alarms We Are Proud To Offer The Industry's Best Guarantee Of 1 Year On All Parts.