Material: aluminum alloy
• Built-in speaker emits clear and loud sound
• Beautiful pen with built-in speaker and built-in lithium battery
• Exquisite design
• PC connection. USB allows users to connect to PC
• Humanized design, high-quality voice
• Operating temperature: -45 to +45
• Effective working time after full charge: more than 4 hours
• Auto off for 3 minutes without use
