I always Wonder, despite the level of transformation in the Church nowadays some church never transform thereself from using bell,whereas most Pentecostal churches have not been using bell.pls what is the important of bell in church

A church bell or "Sanctus bell" in the Christian tradition is a bell which is rung in a church for a variety of ceremonial purposes, and can be heard outside the building. Traditionally they are used to call worshippers to the church for a communal service, and to announce times of daily prayer. They are also rung on special occasions such as a wedding, or a funeral/memorial service. The ringing of church bells, in the Christian tradition, interestingly is also believed to drive out demons.
In Nigeria today church bells are rare, most new churches don't make room for these and even the old churches might not have a functional church bell, some modern Anglican & Catholic churches do have electric bells.

Most Pentecostal churches won't have church bells for a number of reasons; their divergence from traditional Christian practises which they feel might not really have any significance to core principles of Christ, and of course there is the COST, church bells are expensive, heavy and difficult to install & maintain, in Africa, lots of churches are set up by people with little capital, having a church bell is not feasible for most.

They are use in calling down za holy Spirit on za Congration..simple