A keypad or buttons

What it is

Controls on the device itself. Seven listings name one: five locks, one fan and one purifier.

What it requires

Someone standing at the device. For a lock that also means a door already prepared for it, which is the requirement counted on the door page. Among the keypad locks, the only battery wording is the TEEHO’s a low battery alert; the others print nothing about what powers the keypad.

When it is the only way

For the TEEHO, Yamiry and Kwikset locks, the Amazon Basics tower fan and the HAP602 purifier, controls on the device are the only ones named. The site draws nothing from a keypad beyond the words the listing prints.

Listings that name it

• Tower & Personal Fans

  • Amazon Basics 28 inch Oscillating Tower Fan, 3 Speeds, Black

• Air Purifiers

  • HAP602 Air Purifier, 2,400 ft² in 30 mins, White

• Keypad & Smart Locks

  • Schlage Encode Smart Wi-Fi Deadbolt, Century Trim, Matte Black
  • Philips Wi-Fi Keypad Deadbolt with Handle
  • TEEHO TE001 Keyless Entry Deadbolt with Keypad, Satin Nickel
  • Yamiry Keypad Smart Door Knob Lock with Handle
  • Kwikset Powerbolt 250 10-Button Keypad Electronic Deadbolt, Matte Black

Requirements it leans on

• A door that takes it