Deck-side instruction just got easier with the Personal P.A. Fully self-contained with Amplifier, Speaker, Headset Microphone, Belt, and Re-charger included. Just over 1 lb. pound with batteries. (6 AA NiMH batteries included. No Memory effect.) Excellent for small deck side classes where a complete sound system is too much. Take it to the pool with your boom box. This system is intended for small group instruction (up to 20 students depending on surrounding pool noise). Battery life may vary depending on charge, usage, and environment. As the Personal PA is not waterproofed or splash proof it is not intended for in water use.