Product Features: Mobile phone Bluetooth wireless intercom function PC or network intercom music (such as QQ, MSN ... dialogue) Features: Up to 15 hours of talk time is very comfortable answering surround the neck design, whether outdoors or Interior can make you enjoy the fun of music to bring you high-quality 10mm drivers audio visual music control Bluetooth audio receiver three button operation, easy to support low-power tips, low voltage automatic shutdown support A2DP stereo playback and voice capabilities, a Drag two play music. Product parameters: Playing time: 6-8 hours of talk time: 8-10 hours Charging time: 1-2 hours Output Power Class: Class2 SNR: ≥90dB distance: 10 meters barrier supported models: all Bluetooth-enabled MP3 / 4 / IPOD player output amplitude: 500mV (standard signal 1K0db Operating voltage: 3.0V-4.2V Operating Current: <30mA Operating temperature: -10 ℃ ~ + 70 ℃ how to pair the Bluetooth pairing: (1) under the long off Press the POWER / PLAY button for 5 seconds to enter pairing status (when the indicator appears red / blue flash alternately). (2) open the phone settings, turn on Bluetooth, select Bluetooth search function to search for and select OK to connect the phone to a Bluetooth headset after some phone will need to enter the password (0000), the headset is connected to the blue lights and blue lights flash across five seconds twice as successful pairing. (the phone is paired with a Bluetooth phone support some power display.) A headset simultaneously connect two mobile phones (1) After the success of the first mobile phone connection, press 5 seconds after entering long press POWER / PLAY button for 3 seconds off the other hand pairing status (when the indicator appears red / blue flash alternately). (2) The second mobile phone paired mobile phone after the first re-select HV-803 and then connect once, then you can achieve two phone using headphones (3) music status: After the first phone to play, in order to achieve the second mobile phones to play first pause first mobile phone, then you can play the music of the second mobile phone (Note: due to different mobile phone brands, the conversion time is different (4) call state: first mobile phone turned on, At this second phone call to have a beep will be called to answer the second call must hang up the phone the first phone call Note: When charging charging voltage can not exceed 5.5V; charging cable selection criteria. Charging Cable