The MK821 electronic keyboard (often by Meike) is a popular, budget-friendly 61-key portable piano well-suited for learning, offering features like 255 tones, rhythms, 50 demo songs, an LCD screen, teaching modes (one-key, follow, ensemble), and audio input to play along with music from your phone, making it great for beginners to explore music and build foundational skills. 

• 61 Standard Keys: Full-size keys suitable for piano learning.
• LCD Display: Shows settings, making navigation easy.
• Teaching Modes: "One-key", "Follow", and "Ensemble" modes guide users through songs.
• Metronome: Helps develop rhythm and timing.
• Chord Functions: Single Chord, Fingered Chord, Chord Timbre, and Chord Off options for learning harmony.
• Record & Playback: Allows you to record your playing and listen back.
• Demo Songs: 50 built-in songs for learning and inspiration. 

• Timbres & Rhythms: 255 different instrument sounds (timbres) and 255 rhythms to explore.
• Sustain & Vibrato: Adds expressive effects to your playing.
• Keyboard Split: Play different sounds with each hand. 

• Audio Input: Connect phones/MP3 players to play along.
• USB Port: For connecting to other devices (Udisk Jack).
• Microphone (MIC) Jack: For singing along (jack included).
• Headphone/Output Jack: For private practice or connecting to speakers.
• Power: DC 12V / AC Adaptor (included). 

• Portable: Compact size (approx. 930x340x110 mm).
• Includes: Keyboard, AC adapter, music stand, and manual.