Bolt Power GoldHorse Ultra Rugged Portable Waterproof Wireless Bluetooth Speaker 4.0 Bicycle - [Build in LED Flashlight and Microphone with Portable Charger] Waterproof Cutting Edge Technology 4.0 Wireless Bluetooth Speaker allows to Streaming music from Apple, Samsung, Android, Laptop and smartphone. 4 in 1 Bluetooth Multi-function Speakers with "Power Pack, Flashlight, microphone for hands-free speaker phone calling and Dual Powerful Speaker" Wide Range Two highly powerful 30mml total 10W acoustic drivers and ultra-small size produce a wide audio spectrum. Build in Rechargable Lithium-Ion battery with charging time about 4 hours; Cycle life up to 1000 times. Music time up to 10 hours with standard volume.