Different button to call different receiver ^^ Receiver APE 6600: 01. Two prompt modes of vibration and music. 02. LCD display, with sleep function, effectively extending the standby time ^^ 03. Showing a group of three digits, storing ten numbers, scrolling display ^^ Call button APE 350:01. This five-button call bell for guests to use and five receivers for waiters to use ^^ 02. Super thin body, simple and fashionable 03. Silica gel button, felt comfortable 03. It can be used in factory, bank, office, supermarket and other service place