Product Specifications Product name: Wireless Bluetooth earbuds pro Bluetooth version: V5.3+EDR ultra-low power consumption Frequency: 2.4GHz Microphone sensitivity: 42dB Bluetooth distance: about 15m Headset weight: about 3.5g Battery capacity: 45mAh (Bluetooth headset) 450mAh (charging box). Charging power supply. DC5V Standby time: up to 100 hours Music/talk time: 3-5 hours Charging time: about 1 hour Packaging Charging case x 1 USB cable x 1 User Manual x 1 Wireless earbuds pro x 2