Black NOIZY Kameleon Series Bluetooth Speaker Durable silicone skin, Carabiner clip Bluetooth version 2.0, 2.0GHz Frequency Speaker unit: 40hm, 5W x2, Play time: up to 10 hours Splash and dust proof, 3.5mm auxiliary jack, NFC technology Up to 3 hour charge time, Rechargeable built-in 2000mAh Lithium-ion battery