SilverCrest STSK A4 A1 Instructions D'utilisation Et Consignes De Sécurité page 38

Operating time
(music & phone)
Operating temperature
Humidity (no condensation)
Storage temperature
Dimensions
Weight
Notes on Qi technology:
This product with wireless Qi charging technology is designed to comply
with the Qi (Wireless Power Consortium) standard, but no guarantees are
given for its compatibility with all products that comply with the standard .
The specification and design may be changed without notification .
38 GB/IE
approx . 3 hours (with ANC)
approx . 4 .5 hours (without ANC) (at medium
volume)
+10 to +35 °C
10 to 70 % relative humidity
0 to +40 °C
approx . 33 x 23 x 24 mm (headphones)
approx . 61 x 45 x 24 mm (charging box)
approx . 8 .6 g (both headphones)
approx . 52 g (charging box)