Hisonic Dual Wireless Microphone System, HS2300 Dual Wireless Microphone System with 2 Handheld Microphones Long range high VHF transimission and receiving with minimal interference, up to 300 feet Built-in AC adaptor, 120V/220V selectable Two standard 1/4" outputs and individual volume control for each channel 90 days money back guarantee and 1 year limited manufacturer's warranty