Features: The color screen display of mini theremin electronic suite can clearly show the waveform, time frequency and volume level, making it easy to use and understand. This device has more than 70 sound choices, including more than 20 traditional Chinese instruments, which is very suitable for anyone who likes to play music or wants to explore the sounds of different cultures. In addition to being able to connect to devices such as headphones, this theremin instrument also has a built-in speaker, which will automatically turn off when connected to an external device. The detachable antenna is also convenient for storage and access. The compact and exquisite design of this electronic creative instrument makes it easy to hold and play. It can be charged using the Type C interfaces, which allows it to be easily charged on the road with a portable battery. This multi-voice creative toy has a pitchs indicator and a corresponding piano display, which makes it easy for users to stay focused while playing. It is very suitable for beginners who want to learn how to play the piano or any other musical instrument. Specifications: Material:Plastic Size:Approx.98x70x16mm/3.86x2.76x0.63inch Color:Black Package Includes: 1 Set Theremin Musical Instrument note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.