Features: Battery life: 100 hours of standby, 3-4 hours of call/music. Hands-free calling: Built-in sensitive microphone for easy conversation. Easy to use: one-touch control, switch to music or mobile Fast and stable combination: Bluetooth V5.0 + EDR technology, easy to pair with the device. 🎈Technical specifications: Product Name: Bluetooth wireless headset Bluetooth version: V5.0 + EDR, very low power consumption Frequency: 2.4 GHz Microphone sensitivity: 42Db Bluetooth range: about 33 feet (10 meters) Battery capacity: 65 mAh (Bluetooth headset) / 950 mAh (charge box) Load power: DC5V