Nady DVM-PRO Digital 100-Channel 2.4GHz Professional Dual Band Reception Wireless Handheld Microphone - Live Stage Performance Professional 100-Channel Digital Wireless Microphone system with Plug and Play ease of setup Ideal for concert, stage performance, classroom, presentations, karaoke, or interviews 24-bit digital 2.4GHz operation and Dual Band Reception for secure and high-fidelity connection Vivid LCD display and all-metal construction with rack-mountable threads on side panel Convenient and economical AA battery operation with up to 8-10 hours of use