There are three levels of products in total:
File 1: Recording, record and play, can record for up to 25 seconds. When recording and play, other buttons are invalid
2nd gear: shutdown
3rd gear: Midi interspersed with bird calls (voice controlled)

At voltage:Play a playback prompt: Low battery, please charge
Standby: no operation for 8 minutes, sleep.
A prompt sound will be played: Children, I have a great time playing with you Let's play again next time.

4 buttons
K1: Learn to speak, voice randomly, take 5 seconds to move on to the next one, fixed recording for about 2 seconds, then play for about 2 seconds
Press the button and play a prompt sound: Children, read with me
K2: MIDI
K3: 10 different bird calls, 16 animal calls, and 6 vehicle calls. Play in sequence.
K4: Sound size: default maximum 4 levels