![]() E-T-A Engineering Technology E-T-A Engineering Technology (also known as E-T-A Circuit Breakers, Oakland Industries) is a company that manufactures circuit breakers. | ![]() Keystone Electronics Keystone Electronics is a company that designs, manufactures, and supplies hardware and electronic components. | ![]() Kaizhong Precision Shenzhen Kaizhong Precision Technology (深圳市凯中精密技术股份有限公司) is a company that engages in the research, development, production, and sale of commutators, slip rings, and connectors. | ![]() AOI Electronics AOI Electronics (アオイ電子株式会社) is a manufacturer and distributor of electronic components. | ![]() BYD Electronics BYD Electronics (比亚迪电子(国际)有限公司) is a company that manufactures and supplies mobile intelligent terminal components and modules. | |
Founding Date | Founding Date 1955 | Founding Date 1950 | Founding Date 2009 | Founding Date 1969 | Founding Date 1995 |
Type | Type Subsidiary | Type Private | Type Public | Type Public | Type Public |
Tags | |||||
Locations | Locations Mount Prospect, US HQ | Locations New Hyde Park, US HQ New Hyde Park, US | Locations Shenzhen, CN HQ Changsha, CN Heyuan, CN Shanghai, CN Shenzhen, CN Nagoya, JP | Locations Takamatsu, JP HQ Asahimachi, JP Kanonji, JP Minato City, JP | Locations Shenzhen, CN HQ |
Employees | Employees 1411% decrease | Employees 594% increase | Employees 3,68216% decrease | Employees 2,116 | Employees 150,000 |
Valuation ($) | Valuation ($) N/A | Valuation ($) N/A | Valuation ($) 731.7 m | Valuation ($) 175.3 m | Valuation ($) N/A |
Financial | |||||
Revenue (est.) | Revenue (est.) N/A | Revenue (est.) N/A | Revenue (est.) ¥2.6b (FY, 2025) | Revenue (est.) ¥35b (FY, 2025) | Revenue (est.) ¥179.5b (FY, 2025) |
Cost of goods | Cost of goods N/A | Cost of goods N/A | Cost of goods ¥2.3b (FY, 2025) | Cost of goods ¥28.1b (FY, 2025) | Cost of goods ¥162.6b (FY, 2025) |
Gross profit | Gross profit N/A | Gross profit N/A | Gross profit ¥589.3m (FY, 2025) | Gross profit ¥6.9b (FY, 2025) | Gross profit ¥18.5b (FY, 2025) |
Net income | Net income N/A | Net income N/A | Net income ¥233.6m (FY, 2025) | Net income ¥178m (FY, 2025) | Net income ¥3.5b (FY, 2025) |
Operating ⚠ | |||||
Product Categories | Product Categories 4 (Aug, 2024) | Product Categories 7 (Jul, 2024) | Product Categories N/A | Product Categories N/A | Product Categories N/A |

Keystone Electronics is a company that designs, manufactures, and supplies hardware and electronic components.
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Shenzhen Kaizhong Precision Technology (深圳市凯中精密技术股份有限公司) is a company that engages in the research, development, production, and sale of commutators, slip rings, and connectors.
View company
AOI Electronics (アオイ電子株式会社) is a manufacturer and distributor of electronic components.
View company
BYD Electronics (比亚迪电子(国际)有限公司) is a company that manufactures and supplies mobile intelligent terminal components and modules.
View company