AmpliVox Wireless Half-Mile Hailer Kit Black. SW610A Includes powerful 50W multimedia stereo amplifier with built-in 16 channel UHF receiver (584-608MHz). Reverberant outdoor horn provides powerful clear crisp sound. SW610A model includes lapel and headset mics with beltpack transmitter and shoulder strap. Three mic inputs (dynamic condenser wireless) that can be used simultaneously; the condenser (electret) input includes phantom power. Auxiliary input jack with seperate volume and tone controls for CD/tape projectors tablets or i-pod player. Two speaker jacks with total of 4 speakers possible with inYin connector (not included) speaker jacks can support between 4 to 16 Ohms. Auxiliary line out to record presentation in real time Add to this its incredible lightweight portability and this product is assuredly the best in its class indoors or outdoors. Tripod mount built in. Weighs only 4 (8 with batteries). Powerful reverberant horn delivers 108dB sound pressure level over the 450Hz - 4kHz audio range. Reach crowds up to 5000. Covers the length of a football field Lets you see and be seen. Great for athletic events band practice field days public safety law enforcement outdoor marketing events crowd control auctioneers political campaigns missionaries or any outdoor event. PPower with 10 D-cell alkaline batteries (not included) for up to 200 hours or Optional 1460 AC adapter or S1465 Rechargeable NiCad Battery Pack (requires S1460 AC adapter). Dimensions: 12inh x 11inw x 10ind Specifications for AmpliVox Wireless Half-Mile Hailer: Manufacturer: AmpliVox Color: Black Features of AmpliVox Wireless Half-Mile Hailer Outdoors carries sound the length of a football field Reaches crowds up to 5000 50W wireless multimedia stereo amplifier with built in 16 Channel UHF receiver; 584-608MHz Weatherproof reverberant horn speaker Delivers 108db sound pressure level over the 584-608MHz. audio range Lapel & Headset Mics with body pack transmitter Shoulder strap Power with 10 D-cell alkaline batteries (not included) for up to 200 hours or Optional 1460 AC adapter or S1465 Rechargeable NiCad Battery Pack (requires S1460 AC adapter) Package Contents: AmpliVox Wireless Half-Mile Hailer Lapel mic and headset microphones wireless transmitter Shoulder strap AmpliVox SW630: Wireless Half-Mile Hailer Kit Black