Features:
1 . With the App "RealTTS" and connect the headset in this APP that can eralize the function of Caller's Chinese or English name prompt when call is coming. (RealTTS can be downloaded from Apple APP store or Google play market)
2 . Ergonomic earbuds no need Silicone headset Case.
3 . One key to retract, say goodbye to winding cable. Adopted high-quality wire, durable to use.
4 . It has voice broadcast function, such as low battery alert, connection or disconnection alert.
5 . Small size and light weight reduce the burden on your ears. You won't get discomfort even after hours of use.
6 . With Bluetooth V5.3 technology is faster than other devices, the transmission distance is up to 10m. Compatible with a variety of Bluetooth devices.
7 . DSP digital noise canceling for clear voice communication. It reduces real-time ambient and background noises, allowing you to concentrate on calls.
8 . Connect two phones simultaneously, under pairing one phone status to link to another phone.


Specifications:
Brand: Fineblue
Model: F-520
BT Version: V5.3
Color : Black / White
Headphone Size : 5.6 * 2.6 * 2.4cm / 2.20 * 1.02 * 0.94inch
Charging Time : 1.5 Hours
Music Time : 14 Hours
Talkking Time : 10 Hours
Standby Time : 120 Hours
Bluetooth Distance : 10m
Battery Capacity : Built-in 80mAh Li-ion battery
Bluetooth Protocol : Handset, handsfree, A2DP, AVRCP
Frequency Response : 2.4GHz - 2.48GHz
Standby Current : 2mA and less
Charging Voltage : DC 5V
Operating Voltage : 3.7V


Package Includes:
1 x Fineblue F-520 Bluetooth Earphone (Without Retail Package)
1 x USB Cable (USB to USB-C)
1 x User Manual
3 size Silicone Headset Case (one is on headset)