MOMAX Spark True Wireless Headphones

Specification
Input Power : 5V/1A, 5W (USB-C); 5V/1A, 3.5W (wireless)
Working Time : 5 hours (earbuds)
No. of Charge : 3 times (case)
Longest Working Time : 20 hours (w/ charging case)
Battery Type : Li-Polymer
Battery Capacity : ~55mAh (Earbuds); ~500mAh (Charging Case)
Charging Time : ~1.5 hours (Earbuds); ~2 hours (Charging Case)
Driver Type : 5.8mm
Frequency Response : 20-20KHz
Impedance : 32 ohm
Sensitivity : 96db +/- 3db
Supported Profile : A2DP1.3, AVRCP1.6, HFP1.7, HSP1.2
Wireless Frequency : 2.402GHz - 2.480GHz
Effective Range : 10m (Line of Sight)
Size : 39 x 22 x 24mm (Earbuds); 63.5mm x 51.5mm x 26.5mm (Charging Case)
Weight : 11g (Earbuds)/ 39g (charging Case)/ 50g (Total)