Sandberg Bluetooth Earbuds Touch Pro

Bluetooth version: Bluetrum 5.0
Driver Frequency response: 20Hz – 20kHz
Driver size: 8mm
Driver impedance：32Ω
Driver sensitivity: ±92db
Battery type: Lithium-ion polymer (3.7V, 50 mAh each), 500 mAh for charging case
Charging time for earbuds: 1 hour
Charging time for Charging case: 1-2 hours
Play time: Up to 20 hours (with 2-3 times charging)
Standby time: >100hours
Microphone sensitivity: -42±3db
Microphone impedance: 1.2K