This speaker fits in your pocket and makes great sound available everywhere. The IPX7 rating means you don't have to be afraid to take it to the beach or the pool. It is tested at a depth of 1 meter for 30 minutes. Pair it with another speaker of the same model to use stereo sound. You can also play music via 3.5mm AUX or a MicroSD card. The speaker contains a microphone and can be used for hands-free calls. The 1800mAh battery allows you to enjoy up to 10 hours of listening.Specifications: Bluetooth version: 5.0 Range: 10m Power (RMS): 5W Battery: 1800mAh (input 5V/1A) Playing time: 10 hours Charging time: 2.5 hours Audio in: Bluetooth, 3.5mm AUX , MicroSD card Size: 116x70x43mm Weight: 259g Color: BlackIn the package: 1 x SBT325 speaker 1 x Micro USB Cable 1 x Wrist Strap 1 x ManualUser Manual EU assuranceProduct sheet