Features1Power indicator technology is mature, stable and accurate, and can be used for modification and upgrades. 2Strict quality control and quality assurance, high safety factor, can be used with peace of mind. 3This battery indicator is small and exquisite, and takes up little bicycle space. It is a good choice for your bike repairs. 4Easy to install and fix, simple wiring, practical functions, affordable, and can clearly display the power. 5Power display adopts a voltage regulator tube for sampling, an array resistor and a transistor for signal amplification, and an array transistor is used to accurately display the power status.SpecificationItem Type: Electric Bicycle Battery Indicator Material: PlasticWeight: Approx.55g/1.9ozPackage List1 x Electric Bicycle Battery Indicator