Huawei STK-L21 Guide De Démarrage Rapide page 13

Adapters: HW-050200X02 (X represents the different plug
types used, which can be either C, U, J, E, B, A, I, R, Z or
K, depending on your region)
Batteries: HB446486ECW
Earphones: 1293-3283-3.5mm-322, MEND1532B528A02,
EPAB542-2WH05-DH
The product software version is STK-L21:
9.1.0.260(C900E260R1P1). Software updates will be
released by the manufacturer to fix bugs or enhance
functions after the product has been released. All software
versions released by the manufacturer have been verified
and are still compliant with the related rules.
All RF parameters (for example, frequency range and
output power) are not accessible to the user, and cannot be
changed by the user.
For the most recent information about accessories and
software, please see the DoC (Declaration of Conformity)
at http://consumer.huawei.com/certification.
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