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Shenzhen Sumring Technology Co., Limited
Shenzhen Safety Electronic Technology Co., Ltd.
Nie-Tech Co., Ltd.
Ningbo Ambest Electronics Co., Ltd.
Shanghai Kingtech Industrial Co., Ltd.
Shenzhen Professional Security Technology Co., Limited
Hao Nai Industrial Co., Ltd.
Shenzhen Chitongda Electronic Co., Ltd.
Ease Security Co., Ltd.