Package Includes: 1 x Bluetooth Bullet 1 x Micro-USB Charging Cable 1 x Instruction. Using the latest bluetooth chipest V4.1. High sensitivity microphone to ensure high quality calling. Noising cancelling chip integrated. Innovative bullet design. Wide application range such as car ,speakers,headphones and so on. Operation Introductions: Basically: Power On:Press MFB for 3s. Power Off:Press MFB for 3s. Pairing Mode:Press MFB for 6s.(power off status) Exit Pairing mode:Device will exit pairing after 150s if no actions. Shut Down:Automatically shut down if no connection in 10minutes. Calling Conversation: Answer Phone Calling:Press MFB 1 time to answer call. Reject Phone Calling:Press the MFB for 1s to reject the call. Hang up the phone:Press the MFB 1 time to end conversation. Cancel dialing:Press MFB 1 time to cancel the dialing. Redial Last phone:Press MFB 2 times to re-dial last phone number. Streaming Music: Pause music:Press the MFB button 1 time. Play music:Press the MFB button 1 time. Bluetooth Version: V4.1 Battery Capacity: 55mA. Charging Voltage:DC 5V. Charging Time:2 hours Working Time:5 hours. Connection range:10m Headphone Jack: 3.5mm