VEVOR Restaurant Pager System, Wireless 500m Long Range Lineup Waiting Queue Signal, Guest Customer Calling Beepers with Vibration & Flashing, 16 Buzzers for Food Truck, Church, Nursery, Hospital Outstanding Performance Long Usage Time User-Friendly Settings Wide Coverage Turn On/Off Multi-Scene Application Battery Capacity: Lithium Polymer 250mAh,Number of Sub-units: 16+1, Rectangular,Color: Black,Item Model Number: YY-F100-433,Product Weight: 0.6 lbs / 1.3 kg,Product Dimensions: 9.4x6.1x4.7 inches / 240x155x120 mm