RK 528 electronic starter air pump — compact, low‑voltage pump that delivers high airflow and works as both an air pump and a pressure pump. Runs on DC 3V or 3.7V for safe, energy‑efficient operation and easy integration into hobby and small DIY setups. Why you need it Dual‑mode performance: functions as an air pump for continuous flow and as a pressure pump for light pressurization tasks, reducing the need for multiple devices. Low‑voltage compatibility: operates on DC 3V or 3.7V for safer use with battery packs, USB step‑down supplies, or small DC power sources. Space‑saving design: compact footprint and light weight make it easy to mount inside hobby enclosures, inflator housings, or aquarium lids without adding bulk. High flow in a small package: delivers strong airflow useful for inflating lightweight items, aerating tanks, or powering small pneumatic experiments. Key features Model: RK 528 electronic starter air pump Dual function: air pump and pressure pump Voltage: DC 3V and DC 3.7V compatible Compact form factor for simple integration into DIY builds Designed for hobby and small‑scale airflow tasks Practical applications Quick inflations: inflate balloons, air cushions, or other lightweight inflatables for events, packaging prototypes, or craft projects. Aquarium aeration and circulation: provide steady air to improve oxygenation and support filtration on small tanks. Small pneumatic projects and experiments: act as a compact air source or lightweight pressure pump for test rigs, model systems, or simple pneumatic mechanisms. Installation and usage tips Pair the RK 528 with a suitable low‑voltage DC power supply (3V or 3.7V) and match tubing diameter to your fittings for optimal airflow and pressure. Designed for hobby use and small‑scale tasks; not intended for industrial heavy‑duty applications. Easy to mount and integrate into DIY inflators, aquarium setups, or experimental rigs thanks to its compact size. The RK 528 provides an efficient, easy‑to‑install airflow solution when you need reliable performance at low voltage for hobby and small DIY projects.