Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Motorola HS850

I had used the HS700 for ~2 years with good results - clear reception and transmission, comfortable fit.I expected the same or even better performance when I upgraded to the HS850.I was mistaken.The HS850 had crackling reception, was uncomfortable to wear and had this annoying tone that would play when a connection was made and drown out the first words of the conversation.I returned the 850 and bought the HS710.I am satiisfied w/ the 710.