• Upgraded version of DSP dual microphone call noise reduction, dual microphones

• The main microphone collects human voices, and the secondary microphone collects environmental noise reduction

• Intelligent multi-function support for calling name (download TTS-APP)

• Built-in high-capacity lithium battery 90 mAh-continuous talk for 8 hours

• The latest version 5.0 has low power consumption and stable transmission

• Humanized design, both left and right ears can be worn, rotating at 180℃

• Support volume adjustment

• IOS system supports power display

• Support voice switching (Chinese and English)

• Smart one-to-two, connect two mobile phones at the same time

• Support smart mute function

Specification:

• Bluetooth model: F990 (dual microphone passive noise reduction)

• Bluetooth chip: Realtek 8763

• Bluetooth version: Bluetooth V5.0

• Transmission distance: 10 meters

• Transmit audio: Class 2 (-6dbm-4dbm)

• Charging voltage: DC 5V

• Working voltage: 3.7V (3.3-4.2V)

• Battery capacity: 90mAh

• Charging time: about 2H

• Listening time: about 8.5H

• Talk time: about 8H

• Standby time: about 72H

• Charging type: Mirco USB

• Speaker size: 13 (mm)

• DC impedance: 16Ω±10%

• Sensitivity Grade: 111±3dB(at 1KHz 1mW)

• Frequency Response Range: 20HZ~20KHZ

• Rated Power: 3mW

• Maximum Power: 5mW