WIFI & Bluetooth double modes – supports two ways of connection – WIFI and Bluetooth, and allows you to switch between these two modes while playing music. Portable wireless Bluetooth speaker, will bring you wonderful music. 50mm fiberglass speakers. Fiberglass can sharply improve the low frequency performance and make the sound softer and clearer. Will give you a more comfortable listening experience. Rear double bass radiator – adopts the rear double bass radiator which can effectively utilize the air in the cavity to restore the low frequency.