●【Wireles】Tosima TV speaker is equipped with superior wireless transmission technology that can transmit sound up to about 98.8 ft (30 m) (depending on the structure of the surrounding environment and the structure of the building). Can be used in the kitchen or anywhere away from the TV ●Easy to operate: You can control the volume of the unit by turning the volume to turn it on and off. The side of the knob is uneven for easy turning. Easy to use by older people ●3 hours charging & 8 hours continuous usage: The TV speaker has a built-in 1,000 mAh battery. Can be used for approximately 8 hours (at 50% volume). You can also charge the speaker and use it wirelessly ●【Connection & Compatibility】The TV speaker wireless comes with RCA (red and white) plug cable and 3.5mm audio cable. Compatible with other multimedia players, such as TV/PC, MP3/MP4, CD/DVD ●Handheld TV Speaker: This wireless speaker uses a 920 MHz radio band digital wireless system that is difficult to receive obstacles and radio interference and does not delay, so you can hear the sound of your TV clearly at hand