... panel, located at the staff area, including built in audio sound (chime) with optional external speaker. Can be ... 35mAUse Frequency: 315MHz±75kTransmitted Power: ≤20mWTransmitted Distance>1000m in open area Picture of Guest Pager SystemDelivery time:sample or ... , EscrowWarranty: 1 year FAQApplicationsGuest Pager System can be used in restaurants, hotels, hospitals, tea house, coffee shops, health ...