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, Rectangular,Color: Black,Item Model Number: 9106,Product Weight: 0.5 lbs / 1.1 kg,Main Unit Dimensions: 9.3x6.0x1.1 inches / 236x152x28 mm,Sub-unit Dimensions: 4.1x2.0x0.4 inches / 105x50x11 mm