AmpliVox Wireless Handheld Half-Mile Hailer Kit Black. This crowd control horn speaker is made with reverberant outdoor horn speaker that delivers powerful clear and crisp sound. The handheld version of the Samson SW615A Crowd Control Hailser lets you see and be seen and lets you hear clearly too. The handheld version of the Samson SW615A Crowd Control Sounders lets you be seen too as it covers the length of a football field. Weighing only 8 pounds the Samson SW615A Crowd-Control Sounder is easy enough for anyone to carry but it's so light that you can hold it with one hand. This handheld version of the Samson SW615A Wireless Half Mile Field Day Communicaring Sounder has a tripod mount a handheld wireless microphone with built-in transmitter and a shoulder strap. You can power the wireless horn hailer with 10 D-cell alkaline batteries (not included) or you can use the optional S1465 rechargeable NiCad battery pack (requires S1460 AC adapter). The reverberant horn speaker of the Samson SW615A carries the sound the length of a football field and let's you see and be seen. Specifications for AmpliVox Wireless Handheld Half-Mile Hailer: Manufacturer: AmpliVox Color: Black Features of AmpliVox Wireless Handheld 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 Handheld mic with built in 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 Handheld Half-Mile Hailer Wireless Handheld Microphone Shoulder strap AmpliVox SW635: Wireless Handheld Half-Mile Hailer Kit Black