Typical response time for a call back from the on-call supervisor is under 30 minutes. The actual arrival to your site ranges from one to twelve hours, depending on your location. In the event of an emergency, Rolyn recommends that you do not rely solely on contacting us through our website. If possible, please also call our toll free number:1.800.808.1553. Rolyn is not responsible or liable for system malfunctions.