Wireless Powered Companion Speaker for Hailer Family - Includes a built-in 50-watt amplifier that drives a 60-watt horn and wireless receiver for a cordless link between the main PA and the S1244-70. (Transmitter not included - this model must receive its signal from an S1244-70's master transmitter). New Feature: Emergency Siren Button. Power with Optional AC adapter or power up to 200 hours with 10 D-cell alkaline batteries (not included); or Rechargeable NiCad Battery Pack (requires AC adapter).

Wireless Powered Companion Speaker for Hailer Family - Includes a built-in 50-watt amplifier that drives a 60-watt horn and wireless receiver for a cordless link between the main PA and the S1244-70. (Transmitter not included - this model must receive its signal from an S1244-70's master transmitter). New Feature: Emergency Siren Button. Power with Optional AC adapter or power up to 200 hours with 10 D-cell alkaline batteries (not included); or Rechargeable NiCad Battery Pack (requires AC adapter).