Ideal For Classroom Lectures, Outdoor Workshops, Gym Training, Guided Tours, Campus Events. Designed For Educators, Trusted By Professionals: 4000Mah, Up To 30 Hours Continuous Working Time 2000Mah, Up To 15 Hours Continuous Working Time - Teach All Week On A Single Charge Wired Mic Options With Swivel- Adjustable Microphone. Anti-Feedback Technology - No Ear-Piercing Screeches Near Speakers
