Wireless Bluetooth Speaker Rechargeable Battery Big Sound & Good Bass FM Radio Function USB & Micro SD Card Supported Play/Pause & Previous/Forward Buttons Volume up/down Buttons Wireless transmission range: up to 10m Speaker drive size : 3 inch Output Power: 5W Frequency response : 100Hz-20kHz Signal to noise ratio : >=80dB FM scan range : 87.5-108.0mHz USB Charging: DC 5V Battery Capacity: 500mAh Max memory support(USB/SD) : 32GB Playtime: up to 1 hour at 75% volume Charging time: 2 hours Warranty Covered: All our speakers are QC TESTED before we send to you - Shipped within 24 Hrs! 14 Day free return, checking warranty included.