product description:
Product list: Earbuds * 1 pairs
Battery cabinet * 1
Sweatproof earcaps (S / M / L) * 3 pairs
Micro USB * 1
Cloth bag * 1
Note：When the button on main earbud is effective during calling(caller number will be prompted), and the sound only exits in the main earbud.
Product parameters Battery:Polymer lithium battery 45mAh
Bluetooth version： 4.1
Operating voltage：3.2v-4.2v
Sound unit：8MM moving speakers
Impedance：32Ω
Speaker sensitivity：105dB
Speaker Bandwidth：20-20KHz
Microphone sensitivity：-42+-2db
Bluetooth frequency：2.4-2.48GHZ
Bluetooth working range：10 meters
Bluetooth protocol：A2DP/HFP/HSP/AVRCP
Eardbud working range：10M
Battery life： 20 hours
Single earbud calling time：2 hours
Single earbud music time：2-3 hours/battery life：20-30 hours
Single earbud standby time： 12 hours */battery life：240 hours
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