Xiaomi Smart Door Lock 2 Vein Recognition Enhanced Edition opens for pre-order at 1,699 yuan ($235), features vein scanning, ...

Matel Keypad RFID access controller support card, password ... seat to open the door for the allowed visitor. Power supply unit 110-240V input, 12V output to power whole system,can reduce the ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Thomas J. Brock is a CFA and CPA with more than 20 years of experience in various areas ...