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