Hitachi UR18DSALP4 Cordless 18-Volt Lithium-Ion Bluetooth Radio with USB Charger and Alarm (Radio Only, No 18-Volt Battery) Delivers high quality sound from two powerful side firing 7 watt speakers Convenient Bluetooth wireless technology means music can be played from a phone while the phone is with the user Rated IPX4 water resistant for durability during light drizzle USB output socket charges small electronic devices like a phone and stores and protect the device as well When powered by a 3.0Ah battery, the radio delivers approximately 11 hours of listening time off a charge