We were looking for a handy baby monitor for our garden, which should be independent of mains supply in addition, and chose this model. And rightly so. It is very compact, the ability to secure the receiver (parent) wrist etc. is awesome. Just when you want to move freely, which is a better solution than somewhere to lie a normal part of what you no longer hear after 4-5 steps. Only the Accu might have something longer term, but sooo long our mouse is sleeping indeed not at noon at a time. One just needs to turn it thinking time to recharge. Edit: However, we had not bought the device at the specified price? This puts the whole bit .... possibly compare prices; =)