The Havit SF154BT 2:1 Multi-Function Bluetooth Speaker is a flexible and powerful speaker system ideal for listening to music or other audio material. It has an AC power input that can handle voltages ranging from 110V to 220V, assuring dependable and consistent operation. This speaker has remarkable output power, with 5 watts for the sub-woofer and 3 watts for each of the two satellite speakers. The system includes a 4-inch subwoofer and two 2.5-inch satellite speakers that offer clean and powerful music throughout a wide frequency range, from 120Hz to 20KHz. This speaker system can play audio in a variety of ways, including FM radio, USB, TF card, Bluetooth, and AUX input. It also has a clear and easy-to-read display and remote control, allowing you to manage the speaker from a distance. The product is 190mm x 148mm x 190mm and is small enough to fit into most living areas. Each satellite speaker is likewise small, measuring 75mm x 75mm x 170mm. This speaker system provides exceptional sound quality and clarity, with a signal-to-noise ratio of at least 60 dB.