Description: Characteristics: 1.High Fidelity Sound: This bluetooth headset is equipped with high-end Juli 3015 chip, ensures maximum signal quality, and guarantees excellent sound quality. 2.portable storage box, easy to carry and very good for protection, 3.Ultralight and comfortable design, ergonomically-shaped in-ear buds and ear loops brings comfortable and no heavy feeling even after long time wearing, the 180 degree flip boom arm turns around the corner and fit this headset in right or left ear. 4.Compatible with 99% of Bluetooth-enabled devices (such as mobile phones, tablets).up to 4hrs working time &120hrsstand-by with 1hrs quick charge, 10 meters / 30 feet range.used for a long time and the machine is not hot. 5.LED screen displays power, real-time power display 6.Low power consumption is the core technology of headphonesAdopting exquisite energy gathering cabin design, built-in large-capacity lithium battery, escort your earphones Specifications: 1. Headphone parameters Bluetooth-compatible chip: Juli 3015 Bluetooth-compatible version: V5.0+EDR Wireless frequency: 2.4GHZ Support protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission distance: 10 meters Battery capacity: 50mAh Charging voltage/current: 5V/1A Play/talk time: about 4 hours Charging time: about 1 hour Standby time: 120 hours Speaker impedance: 8MM 32 Microphone sensitivity: -42Db Working temperature: -10-50 To 2. Parameters of charging compartment Input voltage/current: 5V/1A Battery capacity: 400mAh Gross weight: 176G Earphone + charging compartment Net weight: 85g Package Included: Earphone*1, charging compartment*1, charging cable*1, manual*1 Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.