Wave touching goodbye. NTB Series No Touch Sensor NTB-1 NTB-1A NTB-2 NTB-3 NTB-2-BK The Alarm Controls NTB Series No Touch Sensor utilizes battery-powered, hands-free activation to extend access control for sensitive applications in an easy and affordable way. Battery powered UL Certification Direct replacement for traditional " request to exit " push buttons Easy retrofit option for code compliant no touch solutions alarmcontrols.comhttp://www.alarmcontrols.com