This was an accessory included with the purchase of a TOTO toilet. Can be mounted on the wall. Four AA batteries are not included. Ready to use immediately after purchase. This is a non-contact, automatic spray-type alcohol sanitizer that can be easily used by simply holding your hand up to it. - Product Name: Hand Sanitizer - Function: Automatic Spray - Design: Non-contact - Features: Alcohol Sanitization Thank you for viewing.