The Bose SoundLink Micro Bluetooth speaker is a popular, highly portable, and rugged wireless speaker known for surprisingly deep bass and a durable, waterproof design. The original model offers up to 6 hours of play time, while the 2nd generation model can last for up to 12 hours. It recharges via a Micro-USB cable (original) or USB-C (2nd gen). Uses Bluetooth for wireless pairing (version 4.2 or 5.4 depending on the generation) and has an integrated microphone for taking phone calls, Durability: Rigorously tested to meet an IP67 rating, meaning it is fully waterproof (can be submerged in up to 1 meter of water for 30 minutes) and dustproof. The exterior is made of a soft, rubberized silicone that resists dents, cracks, and scratches.