AprilYang's Dual Kalimba Pro Model and Lollipop Speaker. This is the latest model. You can change the sound with a switch (6 built-in tones). The keys are a new rounded design. The Lollipop Speaker is a mini speaker that attaches to the Dual Kalimba. (The amplification of sound is less compared to other speakers. Please use it within a range that does not cause sound distortion when increasing the volume. For performances in large spaces, regular speakers are recommended.) All sounds can be heard from the earphones, but the resonance of the lowest "Re" note is short. Although unused, there are many scratches as it is made overseas. Please understand. [Included Items] Audio cable Charging cable Earphones Tuning hammer Tremolo chain Cleaning cloth Charged and operation confirmed. Plug the earphones into the main unit and long-press the button to light up the logo and turn on the power. Press the switch to change the sound (6 types). Long press the power button to turn it off. Operation has been confirmed and will be shipped. In the unlikely event of a malfunction, we will handle returns and refunds (returns are not possible for reasons other than malfunctions). Scratches can be seen on the main unit and keys. Please purchase with your understanding. / The April Yang Board Kalimba 17 keys provides rich sound quality and can be connected to external speakers to amplify music. It also enables dynamic musical performance. Perfect for players of all levels.