T9S-V4(4-man intercom) Riding motorcycle helmet headphones Multiple calls

1. Operating range: up to 30M; 2. Bluetooth: 3.0V, CSR BC05 chipset 3. Transmission range (Hz): 2.4 GHz
4. Sensitivity: - 83dBm 5. Built-in 3.7V, 800mAh Li-ion battery, low battery or no voice prompts.
6. Standby time: 350 hours
7. Talk time: 15 hours
8. Charging time: 2 hours
9. Profile support: A2DP + EDR
10. Support NFC: No
11. Support Siri: Yes
12. Finish: rubberized oil painting
13. Operating temperature: -20 ~ 45 ℃
15. Main Material: ABS
16. Size: 90*45*20mm
18. Weight: 55g
19. Certification: CE, ROHS, TELEC, BQB 

1. Support 2/3/4 people full duplex intercom, 700 meters for 2 people, maximum intercom distance for 4 people 2100 meters.                                                                                                  
2. Bluetooth connection to mobile phone, phone music function and other operations 
3. Switch between music, intercom and phone functions 
4. DSP noise reduction function, echo cancellation and noise suppression                                                                                                                                                                                                                 
5. Waterproof grade: IP67 6. Built-in 3.7V,  800mA lithium battery, 15 hours of talk time, can report the power; Low battery notification.                                                                                                                                                                                               7. Built-in high-sensitivity FM radio, which can be easily stored to play favorite radio stations.                                                                                                                                                                                                                                                                        8. It can be paired with other brands of Bluetooth intercom headsets and ordinary Bluetooth headsets                                                                                                                                                                      
9. Can be connected to ordinary walkie-talkie PTT control intercom; And there is a mixing function 10.The button enters the factory self-test mode, and the function of the key can be detected                                                                                                                                                           11. Support software upgrade (voice in different national languages), easy to customize    

Packing list: 1 Bluetooth host
1 x Stereo headphones
1 USB charging cable: 2 helmet clips (screw clip + velcro clip)
2 microphones (hard and soft)
1 x User Manual