Color: Black Charging voltage: DC/5V Charging time: 1-2 hours Working voltage: DC/3.7V Weight: approx. 32g Size: 15 * 140 * 19.5mm Battery capacity: 400mAh Power: 2.9W Working current: 0-600mA Material: ABS Package List: 1*host, 1*USB charging cable, 1*manual USB Electric Egg Whisk This handheld electric milk frother is rechargeable via USB (no batteries needed). Built-in 1500mAH lithium battery. Charging: red light. Fully charged: blue light (4 hours). Overheat protection: automatically stops after 3 minutes, restart after a long press for 2 seconds. This lightweight milk frother is an indispensable kitchen helper. The detachable mixing head is made of high-quality stainless steel. Made of food-grade ABS, the wand is lightweight, beautiful, space-saving, and easy to clean. This electric milk frother is very quiet, with as low as 15dB of noise, allowing you and your family to enjoy a peaceful morning. 3-Speed Adjustable Milk Frother Speed: 19000rpm & 21000rpm & 23000rpm. Choose different speeds to achieve your desired frothing effect, and be sure to choose a large container. Note: Long press to turn on and off (2 seconds). Short press to change speed. Long press to turn on and off (2 seconds).