One to two Bluetooth connectivity, true 6D surround sound. 1 high medium and low full frequency internal magnetic horn unit Paired with 2 bass capsules, Dual membrane resonance for a more realistic auditory experience. Power Bank Features,USB and Type-C output interfaces facilitate emergency charging of other small appliances. 360omnidirectional sound effect is immersive and stunning. Energy saving and low consumption, keep you up all day. Cool and colorful atmosphere lights, with beautiful and high-quality lighting colors that can be easily switched. Retractable shoulder strap,Shoulder straps can be freely loaded and unloaded, and you can easily carry them wherever you go Hi listen. The casing of the box is made of ABS and rubber materials, which are sturdy and wear-resistant. Protection function:overvoltage protection Input parameters:100HZ-20KHZ USB output parameters:5V 2.1A Type-C output parameter:18W Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Application scope:for Dewalt 18-20V Lithium Battery Colour:Yellow Material:ABS Package Contents: 1 * Speaker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.