Taiwan Headquarter:
A-Four Tech Co., Ltd.
E-mail:market@a4tech.com.tw
Tel: +886-2-2218-4952
6F, No. 108, Min-Chuan Rd., Hsin-Tien City, New Taipei City, Taiwan (R.O.C.)
China Factory:
5-Link Technology Co., Ltd.
E-mail:market@a4tech.com.tw
Tel: +86 (769) 8209-7855
Xiwang Industrial District, Tiantangwei, Fenggang Town, Dongguan City, Guangdong, China
USA Branch Company:
A4Tech USA Co., Ltd.
E-mail:inquiry@a4tech.com
Tel: +1 (909) 628-8858
3929 Schaefer Ave, Chino CA, 91710, USA (For North America Inquiries only)