Features: Wireless Design: Adopting advanced wireless technology to ensures that you can move freely during the teaching process. Quality: Equipped with build-in quality microphone, it captures sound detail clearly, allowing your voice to spread far and sound more pleasant. Powerful sound: High output, knob switching control, 16-gear adjust, suitable for various environment, whether it's classrooms, playgrounds, or outdoor activity, ensuring that all students can hear your explanations clearly. Lightweight and Portable: Design to be lightweight, equipped with adjustable collar clip for easy attachment to clothing, simple and comfortable to use. Long capacity battery: With Type C charging port and a large capacity battery, it can last up to 25 hours and charge more quickly. Specifications: Material: Plastic Size: approx.12x8x4cm/4.72x3.15x1.57inch Color: White, Black Technical parameters: working time 6-8h, single channel , frequency response ranges 40Hz-20KHz, type c charaging port, 76mm driver unit Package Includes: 1 Piece Wireless Lapel Microphone Amplifier 1 Piece Magnetic Clip 1 Piece Data Cable 1 Piece Manual note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.