Features: MicroSD/TF USB Charging Super Long Standby MIC/BXS MIC/AUS Tech Specifications: Charge time: 2-3 hours Playtime: 5-6 hours BT Version: 5.1 Battery: 3.7V 400 mAh Lithium Power Supply: DC 5V 800-1200 mAh Range: 10 meters Transmitting Frequency: 50Hz - 18kHz Includes: Retro Wireless Speaker USB Charging Cable 3.5mm Audio Cable User Manual