SilverCrest TRUE WIRELESS BLUETOOTH STSK 2 A1 Instructions D'utilisation Et Consignes De Sécurité page 16

Range
Rechargeable
battery
Charging time
Operating time
(music & phone)
Operating
temperature
Humidity
(no condensation) 10 to 70 % RH
Storage
temperature
Dimensions
Weight
The specification and design may be changed
without notification .
16 GB/IE/NI
approx . 10 m
Li-ion polymer, 3 .7 V,
50 mAh, 0 .185 Wh
approx . 1 .5 hours
(complete charging cycle)
approx . 3 hours
(at medium volume)
+10 to +35 °C
0 to +40 °C
approx . 40 x 16 x 17 mm
approx . 10 g
(both headphones)