This durable ABS and silicone portable speaker connects to your device with a standard 3.5mm plug and is compatible with most smartphones, tablets, music players, laptops and desktop computers. The rechargeable lithium-ion battery will fully charge in about two hours and delivers 2-4 hours of playback time. The speaker also features a silicone suction foot that doubles as a stand for your mobile device, an on/off switch, blue indicator light when in use, red indicator light when charging and a USB adapter cable for charging. Output: 4ohms/3w.