i9 Plus True Wireless Stereo Bluetooth Earphone Earphone size：22*23mm Charging box size：60*65mm
Earphone weight：5G/PC, Charging box weight：53G
Earbuds Battery capacity：40 mAh
Storage Box battery capacity：450 mAh

Charging time: 30minutes

Play Time: 3-4 hours
Bluetooth version：5.0
Bluetooth range：10M
Speaker：φ10mm *2 Hi-Fi stereo
Storage box charging times：6-10 times
Control modes: touch control Receiving sensitivity：-94dB
Microphone: -42db MEMS microphone.
Frequency：20Hz-20KHz
Voltage：3.7V
Impedance value: 32 ohm

Battery output W: 0.09W