AcquaLink® 52 mm Battery status Gauges are connected directly to any AcquaLink® 110 mm Tachometer using the patented EasyLink serial bus connection. Up to 16 EasyLink gauges for each Tachometer can be daisy-chained together. Giving the customer the possibility to customize the cockpit, AcquaLink® 52 mm Gauges have not included bezel in the packaging.