Speaker

Portability: Smaller wattage speakers (10W, 20W) are more portable, while higher wattage (30W) speakers may be larger but provide superior sound.
Sound Quality: Higher wattage generally results in better sound, especially for outdoor use.
Battery Life: Battery life will depend on speaker size, power, and usage, but higher-wattage models tend to have larger batteries.
Water Resistance: If you plan to use the speaker outdoors, check for water resistance ratings such as IPX4, IPX5, or IPX7.