1). ON/OFF Powerful Controller
2). Stop / Continue (When call comes ,short pressing is for answering .long pressing is for rejecting)
3). V+ next (Long pressing is for raising voice)
4). V- Previous (Long pressing is for reducing voice)
5). LED Warning Lights
- Bluetooth Waiting Connection: Blue lights fast flash 
- Bluetooth Connected Successfully: Blue lights flash twice / frequency
- Red lights always shining during charging. Red lights was off when finished charger
6). Audio output (Use 3.5 line to connect computer or personal phone )
7). Charger DC5V (Use Micro USB to connect)
8). Bluetooth Max Connect Distance: 10m
9). Intelligent voice prompt