Lansinoh Manual Breast PumpLansinohs Manual Breast Pump provides a portable and convenient option for breastfeeding women who want to express discreetly and in comfort while on the move, as it does not require batteries or an electrical source. Designed for ease of use, a simple switch at the top of the handle enables you to switch between the let down and expression phases of breastfeeding. The let down phase mimics your babys natural sucking style at the start of the feeding