Low power: Red (flashing)
Charging: Red (solid), Power full: Blue (solid)
Pairing: Blue & Red (flashing)
Bluetooth connected: Blue (slow flash)
Bluetooth unpaired: Blue (rapid flash)

Profile: A2DP, AVRCP, HSP, HFP
Frequency: 2402MHz-2480MHz
Speaker driver: Φ40mm
Frequency response: 20Hz～20KHz
Sound press level: 113dB±3dB
Microphone: Φ4.0*1.5mm, -42±3dB
Power Source: 450mAh/3.7V (Li-polymer)
Battery dimension: 30*38*6mm

 189g