Party speaker: Brilliant light effects and surround sound effects, BT speakers with special lights can give an exciting atmosphere, suitable for home, gym, backyard, camping, swimming pool, to the beach. The speaker has surround sound effects, such as jazz music effect, rock music effect, classical music effect, pop sound effect and more. Wireless Speakers: Equipped with FM Radio. The FM radio can search for available stations in your area. The speaker's FM radio can also manually tune in a station using the remote. The top of this portable speaker has a hand-pulling ring and a stand that can support cellphones, tablets, etc. speaker size 4inch great sound