Bluetooth, Waterproof Indoor/ Outdoor Wireless Bluetooth Speakers, Built-In Microphone (Yellow/Gray) Rechargeable battery. Outstanding Acoustical Sound. Bluetooth Speakers Waterproof, Bluetooth wireless portable waterproof outdoor/indoor speaker, Use for shower, boating, beach, lake, camping, hiking or biking. Integrated Bluetooth wireless technology with a 10-12 hour battery life before recharging 33-foot effective wireless range with quick press for next song; Volume button and power on and off switch Built-in lithium battery re-chargable battery and 3.5 mm auxiliary cord jack and charging cable Built-in microphone, easy paring with most mobile phones; USB Charging Cable; Power on and off switch and easy hook for carrying.