Silvercrest STSK 2 C3 Operation And Safety Notes page 73

Headphones
Wireless standard Bluetooth
Supported profile
Frequency band
Max . transmitted
power
Range
Rechargeable
battery
Charging time
Operating time
(music & phone)
Operating
temperature
Humidity
(no condensation)
Storage
temperature
®
A2DP, AVRCP, HSP, HFP
2402 to 2480 MHz
< 10 mW
approx . 10 m
Li-ion polymer, 3 .7 V,
40 mAh, 0 .15 Wh
approx . 1 .5 hours
(complete charging cycle)
approx . 3 hours
(at medium volume)
+10 to +35 °C
10 to 70 % relative
humidity
0 to +40 °C
5 .0
GB/IE 73