The Smart Lock U400 leads on specs, ahead in 2 of 3 areas.
The Smart Lock U400 wins 3 of the 4 specs where they clearly differ. The Tapo DL110 costs $120 less. Biggest difference: Thread (Yes vs No).
Not enough data to chart: Access, Privacy & Local Control.
Based on 7 and 5 scored specs of 7. Unknown specs are skipped. How we score
Price as of 4 Nov 2026 · amazon.com
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Smart Lock U100$149.99
Bolt SE
$79.99$99.99
Smart Lock C220
$119.99$169.99
Assure Lock 2 Keypad with Wi-Fi
$195.22$259.99
Encode$229.31
21 specs, grouped by area.
| Fact | Smart Lock U400 | Tapo DL110 | Margin |
|---|---|---|---|
| Unlock methods Auto-unlock uses your phone's location. Fingerprint and keypad work without a phone, useful for kids and guests. | AppKeypadFingerprintNFCApple Home KeyAuto-unlock | AppKeypadFingerprint | |
| Auto-lock Locks itself after the door closes. Works best with a door sensor. | Yes | Yes | |
| Door sensor Knows if the door is open or closed, not just locked. | Yes | ? |
| Fact | Smart Lock U400 | Tapo DL110 | Margin |
|---|---|---|---|
| Installation Retrofit locks sit on the inside and keep your existing key. Renters usually want retrofit. | Full lock replacement | Full lock replacement | |
| Lock standard Euro profile cylinders are common in DE, NL, FR and the Baltics. Check the emergency function on your cylinder. | US deadbolt | US deadbolt | |
| Security certification Independent tests such as SKG (NL), VdS (DE) or ANSI/BHMA (US). | BHMA certified (grade not stated) | ANSI/BHMA Grade 2 |
| Fact | Smart Lock U400 | Tapo DL110 | Margin |
|---|---|---|---|
| Battery life Manufacturer estimate at ~8 operations per day. Wi-Fi locks drain faster than Thread or Bluetooth. | 6 months | 12 months | +100% |
| Battery Rechargeable packs are convenient but the lock is offline while charging unless you have a spare. | Rechargeable pack | Rechargeable pack |
| Fact | Smart Lock U400 | Tapo DL110 | Margin |
|---|---|---|---|
| Wi-Fi 2.4 GHz has longer range. Dual band helps in crowded apartment buildings. | No | 2.4 GHz | |
| Thread Low-power mesh used by Matter. Needs a Thread border router (HomePod mini, Nest Hub, SkyConnect…). | Yes | No | |
| Zigbee Mature mesh protocol. Works locally with Zigbee2MQTT or ZHA in Home Assistant. | No | No | |
| Bluetooth Usually only for setup or short-range control. | Yes | Yes |
| Fact | Smart Lock U400 | Tapo DL110 | Margin |
|---|---|---|---|
| Matter Works with every major platform locally. Check which device types are supported — some features may stay app-only. | Yes | No | |
| Home Assistant Core integrations ship with Home Assistant. HACS integrations are community-maintained and can break after updates. | Matter | ? | |
| Alexa | Yes | Yes | |
| Google Home | Yes | Yes | |
| Apple Home | Yes | No |
| Fact | Smart Lock U400 | Tapo DL110 | Margin |
|---|---|---|---|
| Works offline Keeps working with your internet down — schedules, automations and local apps still run. | Yes | Yes | |
| Cloud account required You must create a manufacturer account to set it up. Some devices stop working if the cloud shuts down. | No | ? | |
| Subscription for key features Features locked behind a monthly fee, e.g. history, AI detection or remote access. | No | No | |
| Firmware updates via HA Update the firmware from Home Assistant without the vendor app (Zigbee2MQTT OTA, Matter OTA). | ? | ? |
