Cordless speaker compatible with Makita 18V li-ion BL1830, BL1840, BL1850, BL1860, BL1860B, and BL1870 series batteries. Use your own battery to enjoy high-quality stereo sound. Features low-voltage protection: the speaker automatically shuts down when battery voltage drops below 15.5V to prevent damage. Portable speaker delivers clear highs, deep bass, and true HD sound through the built-in driver. Works seamlessly with smartphones, tablets, laptops, and other o devices. Equipped with 7 lighting modes that sync with music, enhancing the o experience with dynamic light effects. Press the button briefly to cycle through colorful light options. Supports playback via USB drive and TF card (not included). Simply disconnect Bluetooth and insert your USB or TF card to play music directly. Features USB-A (DC 5V/2.1A) and USB-C (15W) ports for charging low-power mobile devices. Low-voltage battery protection alerts: a "Power low" warning sounds when voltage falls below 15.5V; at 15V, a "Power off" alert is issued and the device shuts down automatically to protect the system. Color: Blue Green Material: ABS This product is a speaker only and does not include an 18V battery. Actual product color may vary slightly due to lighting or screen display differences. Package Contents: 1 x Bluetooth Speaker Note: The image may show slight color variation due to lighting or monitor settings. Measurement error allowed within +/- 1-3 cm.