[Machine Translation] Beat-in's "Beat-in Power Bank" is a left/right independent wireless earphone with mobile battery function. It is an ultra-compact, ultra-lightweight, completely cordless, and stress-free earphone. The innovative fully independent wireless earphones are Bluetooth-enabled and have no cables. The earbuds are completely independent and stress-free. The "Beats-in Power Bank" combines the left and right independent wireless earbuds and a mobile battery in one unit. The compact case conveniently functions not only as a battery for the wireless earphones, but also as a 2100mAh mobile battery with USB output. When the battery is fully charged, it automatically stops charging to prevent overcharging. The design is simple and compact, ultra-compact and ultra-lightweight among fully wireless earphones. The fit is good, and although they are small, they do not easily fall out of the ear. Bluetooth 4.1 compatible Bluetooth version 4.1 is supported for pairing. The Bluetooth 4.1 compatible pairing is compatible with Bluetooth version 4.1, and can be used comfortably within a communication distance of 10 meters. High-quality sound and hands-free callingThe high quality sound is clear and well-balanced at all frequencies, making it easy to hear. The built-in microphone enables hands-free calls. The earphones are firmly adsorbed by magnets inside the case, so you don't have to worry about losing them or dropping them. The earphones and case are available in a variety of stylish metallic colors. Both the earphones and the case are available in four popular colors: space gray, gold, silver, and rose gold. <Product Specifications> Earphone battery capacity: 55mAhBluetooth version: 4.1 Voltage: 3.2V - 4.2V Microphone sensitivity: -40 2db Frequency: 2.4 - 2.48GHZ Maximum communication distance: 10 m Audio transmission formats: A2DP/HFP/HSP/AVRCP CODEC: AAC/SBC Battery charging capacity: 2100mAhDC Output voltage: DC5VDC Output current (MAX ): 1ADC Charging voltage: DC5VDC Charging current (MAX ): 1A