AmpliVox S1600 Wireless Lapel Microphone Kit, Two Frequencies, 300 ft. Range APLS1600 APL S1600, Converts all AmpliVox sound systems to wireless, providing an instant boost to any presenter's stage presence. Switch selectable radio channels give users two operating frequency options, making interference easy to avoid. Clip-on condenser lavaliere microphone features a low profile design and a sensitive uni-directional pickup pattern that's perfect for professional public speaking engagements. Dependable trnsmitter ensures a consistent signal up to 300 ft. away. For added flexibility, the receiver may be powered by either a 9V battery or the included AC adapter. Cord Length: N/A; Maximum Wireless Range: 300 ft; Mounting: Lapel; Power Source(s): Receiver: 9VDC; Transmitter: 9V DC., UPC 734680016005