Lapel Clip-on Design Leads a Wireless Experience: The newly upgraded Wanmi first lapel clip-on amplifier allows you to enjoy clear sound while moving freely, saying goodbye to the head pain caused by wearing headsets. 2.4G Wireless Dual Microphones for Unrestricted and More Carefree Experience: Equipped with 2.4G technology, say goodbye to headsets for more freedom in teaching. Versatile with various outfits, making you the center of attention. Large Speaker, Loud Volume, and Speaker Protection: High-quality large speaker with higher volume, accurately reproducing details in the audio signal, louder sound, and wider coverage. Upgraded Bluetooth, Instantly Becomes a Mini Speaker in 5.3 Seconds: Connects to multiple devices via Bluetooth, instantly transforming into a speaker for all-around sound quality, avoiding latency, while enhancing anti-interference capabilities and connection stability. Play courseware, music, and watch videos without delay, providing a smooth Suitable for Multiple Scenarios, a Highlight Everywhere: Whether in classroom teaching, meetings, training sessions, or tour guiding, it easily amplifies sound and dominates the entire venue. Specifications Product Model: K1 Operating Voltage: 3.7V Signal-to-Noise Ratio: >76dB Speaker: Ø77mm, 4 ohms, 5 watts Frequency Response: 80Hz-20kHz Bluetooth Version: Bluetooth 5.3 Charging Voltage/Current: USB DC5V=0.8-1A Color: White Material: plastic Package Contents: 1* Megaphone 2* Microphones 1* Shoulder Strap 1* Charging Cable