♬ PRODUCT SIZE - Piano size: 17 * 6.3 * 2.1 inch (L * W * H), microphone size: 5.5 inch. | ♬ TWO POWER SUPPLY METHODS - a: Powered by 3 AA batteries (not included). b: Connect one end of the USB cable provided by us to the DC jack on the back of the keyboard, and connect the other end to the USB adapter with "5V-1A" power output (not included) | ♬ SINGLE SPEAKER PIANO - It is made of high-quality ABS material, with fine workmanship and smooth edge design. The piano keys are specially designed for the little fingers, allowing children to better practice playing the piano. Easy to carry, children can play indoors or outdoors. The single speaker design is to cultivate and inspire children's musical talents, protect their hearing, and enjoy music to the full. | ♬ MULTIFUNCTIONAL 37-KEY PIANO - Piano playing function + ensemble mode + detachable microphone + keyboard drum + recording and playback function + automatic standby sleep function + 8 tones + 8 rhythms + 6 demos + 4 percussion. You can adjust the speed and volume by yourself. | ♬ BEST GIFT FOR CHILDREN - Piano can inspire children to have a love for music and creation, and cultivate good self-esteem and strong imagination. The musical children's piano with microphone can sing while playing, helping develop children's playing skills, hand-eye coordination, music theory and fine motor skills. It is the best gift for children over 3 years old.