Business Collar Clip: LED screen for battery status,20 minutes to charge, 20 hours to play Outdoor riding:Free your hands for ,Clear voice against wind noise Driving a car:All the way to use,Incoming call alert Campaigns:Unrestricted Fitness,Music all the time Ultra-long battery life,20H of continuous talk:The headset takes only 20 minutes to fully charge,20 hours of talk time on a single charge Soft headphones with comfortable in-ear fit wireless electronic devices:Intelligent compatibility with electronic devices with wireless,Open the connection and use it directly Stand-alone button:One-touch multifunctional key operation Wireless version: V5.4 Version agreement: A2DP, AVRCP, , HFP Effective distance: 10m Frequency range: 50Hz-50KHz Music playback: 20h Charging time: 20min Charging port: Type-C charging port Colour:black Material:plastic Package Contents: 1 x Bluetooth Headphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.