Focus Pro - An Upgrade to the Dynamo - lighter in weight and more powerful - the Focus Pro is a great choice for small rooms and for a good vocal assistant in contained outdoor areas. 50 watts of power with a 6.5” speaker for excellent voice reproduction. Completely portable - rechargeable Lithium-Ion battery or plug it in and run it from standard AC - take it where you need sound. The built-in Fitness Audio wireless receiver allows you to use a dry Fitness Audio body pack transmitter and E mic or Aeromic headset or handheld transmitter for deckside instruction, lecturing, making announcements, or multimedia presentations. The Focus Pro covers all of your music needs for fitness - with option Bluetooth music streaming, plus additional audio inputs to add the most popular personal MP3 or CD players on the market. Optional travel bag and tripod stand. Not intended for in water use or splash proof - water damage is not covered under warranty.