Dongguan Yinlang Electronic Technology Co., Ltd., also known as ELA, is a Chinese manufacturer of smart door locks and hotel locking systems. Established in 2002, the company offers more than 40 smart lock models for residential, apartment, hotel, and commercial use. Its products include hotel locks managed by card, Bluetooth, or online systems, alongside residential locks with fingerprint, password, and facial recognition features.

The range also covers Wi-Fi and Bluetooth-enabled locks, Tuya and TTLock app-connected models, RFID and digital card locks, keyless entry systems, rim locks, deadbolts, push-pull designs, and locks for sliding and glass doors. Options are available for different door materials, including wood, steel, aluminum, and stainless steel. Yinlang also supplies lock accessories and related items such as remote key cases, DND panels, doorbells, and switches.

The company states that it has an in-house research and development team of electronic and mechanical engineers. Its products are presented for applications including homes, apartments, hotels, offices, schools, and government facilities, with selected models offering connected access management and usage tracking.