4 Riders 1000 Meters Intercom Headset With Audio Input For TTS With bluetooth Function

4 Riders 1000 Meters Intercom Headset With Audio Input For TTS With bluetooth Function Description: 1.4-Way bluetooth Intercom Conferencing,Support 4 users all same time full duplex talking 2.MULTITASK----allows you to have an intercom conversation while simultaneously listening to music,GPS and talk via Walkie Talkie. 3.1500M talking range in open terrain 4.Music Sharing 5.Support software upgrading 6.AUX port,can connect with Walkie Talkie (connect cable optional) 7.Charging port and Earphone separately,can use when charging 8.Advanced Noise cancellation,Microphone will turn off when keep silent,and when speak will turn on microphone automatic 9.Interchangeable hybrid and corded microphones 10.Can be used with all EJEAS and non-EJEAS bluetooth headsets on the market. 11.HD-Speaker 12.Quick pairing 13.VOX---Make / Receive / Reject calls by voice command or at the push of a button 14.Built-in FM Radio 15.English status Voice Guide 16.Waterproof & Dustproof Specification: Dual Mode:bluetooth 4.1+bluetooth 4.0 Chipset: CSR BC8 bluetooth Profiles: HSP,HFP,A2DP,AGHSP,AVRCP Working time: 12 Hrs Standby time: 300 Hrs Charging time: 3 Hrs Battery: 800mA Lithium Polymer Battery Operating temperature: -10?C ~ 55?C (14F ~ 131F) Intercom Size:83*42*19mm Intercom Weight: 85g Certificates: CE,ROHS,FCC,BQB Pcakage Included: 2 X Intercom Headsets