What are the differences between Pro 2 and Pro 2 Ultra?

Pro 2.0: Supports 6 unlocking methods — Fingerprint, PIN, OTP, App, RFID, and Mechanical Key.
Pro 2 Ultra: Supports all 6 unlocking methods available on the Pro 2.0 plus Face Recognition, offering a total of 7 unlocking methods.

Pro 2.0: Powered by 8 AA Duracell batteries (disposable).
Pro 2 Ultra: Features a rechargeable lithium battery, eliminating the need for regular battery replacement.

Both models offer the following features:

Built-in Door Sensor: Both include an in-built door sensor for real-time door status monitoring.
Real-Time Status Alerts: Both provide alerts when the door is left open, locked, or unlocked.
Security Bolts: Both feature 3X reinforced stainless-steel bolt for maximum security.
Remote Access: Both support the Wi-Fi Gateway, enabling remote locking, unlocking, and notifications.
Compatibility & Size: Both locks are compatible with wooden doors 35–65 mm thick and have the same physical dimensions of 72 mm × 417 mm.