This is a wave bed pump. It was bought together with a wave bed (example: see pic 4), but we only selling the pump. 

Wave beds prevent direct contact between mattress and patient relieving them from nasty bed sores and skin inflammation. 

Used for only 2 months. This pump is suitable for those whose pump has stopped working but the wave bed is still in good condition. The pump does not last as long as the bed because it usually runs 24 hours for bedridden patient. 

Cash and carry at our upper aljunied road address.