★★★ Use this wireless paging system for fast food restaurants, food courts, pizzerias, churches and car dealerships. Notify people quickly and you can reduce crowds in ordering and waiting areas. Customers can find a convenient place to wait or chat while they wait. The restaurant environment has become more orderly.●●Host parameters●●Input power: DC12V/1.5ATransmission frequency: 433.92MHzTransmit power: +23dBmStandby power consumption: <600mWModulation Mode: OOKNumber of charging handsets: 20Number of game subs: 998Key mode: touch keyShell material: ABSDimensions: 290*155*32mm●●Slave parameters●●Working voltage: lithium battery 3.7V200mAhReceiving frequency: 433.92MHzStandby current: <12mAStandby time: 24hReceive sensitivity: -108dBmTransmission distance: 500mPrompt method: vibration / buzzer / flashing lightReminder duration: 1-999 seconds can be setShell material: ABSDimensions: 100*50*10mm●●Packing List●●1 * Wireless calling system1 * Power Plug20 * Pager●●Precautions●●1. Manual measurement, please allow 1-10mm deviation.2. Due to the difference in light and screen, the color of the product may be slightly different from the picture, I hope you understand.★★★ Welcome to "YILEFU" shop to find more similar products, we sell high-quality products with the best price and excellent service. Your questions will be answered within 24 hours, if you have any questions, please feel free to contact☀Have a nice day☀