HAVIT HV-M6 Wireless Bluetooth 4.0 NFC Sports Speaker, with Built-in Microphone, Support TF Card, 3.5mm Audio External Connect, Up to 6 Hours Music Playing (Blue) Bluetooth 4.0 + EDR, with ultra-quick connect NFC function Built-in microphone for hands-free calls Supports TF card to play music accompanying (MP3, WMA format music player full rate);. Supports 3.5mm audio interface to connect external Built-in high-performance lithium battery, accompanied by music throughout the day, long standby, can play music at moderate volume levels for 5-6 hours, 80 hours long standby Shockproof silicone design, hidden interfaces, waterproof and dustproof