Main Features:● Bluetooth version: 4.1
● Sports earphones specially designed to give you freedom while doing your favorite sport
● Light， flexible and fashion. They will accompany you in your hardest training
● Noise-cancellation stereo headphones， comfortable fit thanks to the in-ear design
● Soft silicone ear cushions to fit your ear shape perfectly
● Easy operation， with the buttons of pre / next， pause / play， on / off， volume， etc.
● Multi- point supports to connect 2 mobile phones at the same time
● Support handsfree， when a call comes in， a gentle vibrating alert lets you know
● Special language switching function: Press and hold multifunctional button + volume up button for about 3 seconds， it will switch the language ( Portuguese / Italian / Chinese / English )
● Built-in rechargeable 500mAh lithium battery
● The cable length: About 57.5cm / 1.89ft Model: LC -777
Wearing type: In-ear with ear hook
Function: Answering Phone，Microphone，Multi connection function，Noise Cancelling，Song Switching，Voice control Connectivity : Wireless
Connecting interface: Micro USB，USB
Application: Mobile phone，Sport
Frequency response: 80~20000Hz
SNR: No less than 80db
Working Voltage: DC 5V
Working Time: 10 hours Bluetooth version: V4.1
Bluetooth distance: W/O obstacles 10m Battery Types: Lithium battery
Battery Volatge: DC 5V
Battery Capacity(mAh): 500mAh Package weight: 0.102 kg
Package size (L x W x H): 20.50 x 13.00 x 4.00 cm / 8.07 x 5.12 x 1.57 inches Package Contents: 1 x BOAS LC - 777 Portable Universal Wireless Bluetooth V4.1 Stereo Headset Earphone with Built-in Microphone， 2 x Hook， 3 x Earbud， 1 x USB Cable， 1 x Bilingual User Manual in English and Chinese