Yamazen Curiom Wireless Handheld Speaker Waterproof and (AC Powered/Battery Compatible), Dustproof, YWTS-800W

Power supply: 3 AA batteries, AC adapter (sold separately) Battery life: Approximately 20 hours (measured according to JAITA (Japan Electronics and Information Technology Industries Association) standards) Practical maximum output: 2W Wireless transmitter included (AC adapter powered) Wireless transmitter range: Approximately 30m Water-resistant