Color: A:Green/B:Red/C:Grey Material: plastic Product Instructions:1. Press the power button to turn on the device. The screen will display 000 after turning on the device. Long press the power button to turn off the device. 2. When the device is turned on, click the switch to enter the first mode. The screen will display 001. 3. When the device is turned on, double-click the power button to enter the second mode. The screen will display 002. 4. The first mode is the timing mode. The timing is 30 seconds. If you press the wrong button or the time is up, the game will end. 5. The second mode is the variable speed mode. This mode has four sections of variable speed and four sections of music. You can challenge 999 points to pass the level. 6. When the device is turned off, press the power button alone. The screen will display the highest score in the first mode. 7. When the device is turned off, double-click the power button. The screen will display the highest score in the second mode. 8. When the battery is too low, a "beeping" sound effect will be emitted. You need to charge it in time. The highest score record will be cleared when the power is off. Package Contents: 1 x Keyboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.