- 50 watt multimedia stereo amplifier with built in wireless receiver- 16 Channel UHF wireless receiver from 584MHz - 608MHz- Includes SW610A, extra horn speaker with 40 ft. cable, 2 tripods, rugged nylon carrying case with wheels and retractable luggage handle- Weatherproof reverberant horn speaker carries sound the length of a football field- Wireless lapel mic and headset mic with body pack transmitter- Emergency Siren Button- Play Siren Function- Dual Wireless Capability: 2 presenters can be wireless with optional 2nd wireless mic kit- Power up to 200 hours with 10 D-cell alkaline batteries