Feature: 1. Easy to Use: Perfect for beginners or experienced musicians, mini theremini's assisted pitch correction feature allows each player to adjust the instrument's playing difficulty level, develop your musical talent, and improve your pitch accuracy. 2. Color Display: Mini theremin with a color display, which can display the waveform, time frequency, volumes, as well as the tone indicator and corresponding piano tone display. 3. Function Settings: Easy to use and operate, various device function settings can be realized by the 4 control buttons on the panel. Device configuration information such as volumes, tones, ringtones, etc. will be lost after restarting, if you want to preserve settings, save it to the settings interface. 4. Adjustable Voices Design: There are more than 70 kinds of voices to choose from, including more than 20 traditional Chinese folk instruments. The built in tuner uses the Organic Light Emitting Diode screen to provide real time visual feedback of each note as it is played and how close to perfect it is. 5. Complete Accessories: Self contained speakers and plug in antennas, with antenna calibration function. In addition to connecting to sound devices such as headphones, you can also play sound through the independent speakers. When the sound device is connected, the external speakers will automatically turn off. The antenna can be unplugged, extended and retracted, which makes it more convenient for storage. 6. Exquisite Appearance: The overall appearance is small and exquisite, comfortable to grip. It is very convenient to use and extremely playable and perfect as a present for a friend. Specification: Item Type: Mini Theremin Product Material: ABS, Acrylic Product Size: Approx. 98x70x16mm / 3.9x2.8x0.6in Power Supply Interface: Type C Tone: More Than 70 Kinds of Tone Choices. Package List: 1 x Theremin1 x USB Cable2 x Antenna1 x Instruction Manual Note: 1. Due to the small antenna, you may feel that the theremin is not sensitive enough. You can purchase a large antenna (3.5mm), or connect the original antenna to a metal piece or rod to increase the control range, or press a metal block directly onto the original antenna.2. The tone control will be more stable after the instrument is turned on for 5 minutes.3. All data are measured manually, and there are certain errors in the measurement results.