Restaurant Coaster Pager System 10 Beeper Receivers Max 999 Buzzers. Specifications: Model Number: Pager Frequency: 433.92MHz Shell Material: High-quality Polycarbonate Prompt Mode: Vibration & Buzzer & Vibration + Buzzer Power Supply: Built-in 3.7V 360mAh Rechargeable Lithium Battery Charging Base Adapter: Input: AC 100-240V, 50/60Hz Output: DC 5V, 4A Keypad Keylife: Million and Above Pager Number: 10 Pcs Expandable Number: 999 Pcs Working Distance: 800-1000m (open Area) Application: Cafe Shop, Fast Food Shop, Food Court, Pizza Shop, Church ,clinic Wireless Calling Receiver: Pager Restaurant Call Customer Service: Customer Service Number Queue System: Waiter Call Button Waiter Calling System: Restaurant Page Pagers for Restaurants: Restaurant Calling System Restaurant Pager System: Wireless Queue Calling System . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.