Based on this product's specifications, here are some alternatives and similar models
Wireless keypad NUKI Keypad 2.0 Bluetooth Black — Bluetooth interface, press buttons, 10 m range, AAA batteries
Summary description:
NUKI Keypad 2.0 is a wireless Bluetooth keypad in black designed for keyless access control. It uses a Bluetooth interface with a maximum range of 10 m and press buttons for PIN entry. The compact unit (118×29×21 mm, 90 g) operates between −20 and 70 °C and runs on four AAA 1.5 V alkaline batteries. Suitable for home or office entrances requiring simple, battery-powered PIN access.