The Spectra 9 Plus is a portable and rechargeable double electric breast pump designed for convenient and efficient milk expression. This bundle set includes various flange sizes (24mm, 28mm, and 32mm) to ensure a comfortable and effective fit for a wider range of users. Key features include a closed system to prevent backflow and keep milk hygienic, adjustable suction levels and cycle speeds for personalized pumping, a massage mode to stimulate milk let-down, and a quiet motor for discreet pumping. The compact and lightweight design makes it ideal for on-the-go use. The 'Bundle Set' suggests it may also include extra accessories like bottles, nipples, or storage bags, though specifics aren't mentioned in the name.