96 yellow-orange, flickering LEDs produce flame-like effect; Water-resistant (IPX4); Bluetooth(R) v4.2 for music streaming and hands-free call answering from Bluetooth(R)-compatible devices; Noise- and echo-canceling speakerphone; FM radio ; USB and TF/microSD(TM) Card inputs; Rechargeable, 3.7-volt 1,200 mAh battery; Up to 4 hours for charging; Bluetooth(R) TWS (True Wireless Stereo) capability enables 2 of the devices (second device sold separately) to be connected, synced and play audio simultaneously for a stereo audio experience; Includes micro USB charging cable;