How long does the battery last?

The battery life is approximately 1 year, powered by 4 AAA alkaline batteries (not included).

What door thickness is compatible with this lock?

It fits doors with a thickness of 35mm to 50mm (1.38 in. to 2.16 in.).

Keypad Wi-Fi Electronic Single-Cylinder Smart Lock Deadbolt Featuring Smartkey Security

Name: Keypad Wi-Fi Electronic Single-Cylinder Smart Lock Deadbolt Featuring Smartkey Security
Brand: Fujian Chainfun Electronic Technology Co., Ltd.
SKU: 1998785805

Fujian, ChinaFujian Chainfun Electronic Technology Co., Ltd.

US$60.00

20-99 Pieces

US$56.00

100-199 Pieces

US$53.00

200-499 Pieces

US$49.00

500+ Pieces

Sample price:US$70.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Free Spart Parts

Warranty

12 Months

Model NO.

D31

Material

Zinc Alloy

Type

Electronic

Style

European

Shape

Mortise Door Lock

Anti-theft Standard

Part

Lock

Backset

60mm

Door Thickness Fits

35-50mm

Usage

Household Door Locks

Transport Package

Standard Export Packing

Specification

30X14X20 cm

Trademark

ChainFun

Origin

Fujian, China

HS Code

8301400000

Production Capacity

200000

Key features

BHMA Authenticated Security: Certified by BHMA for superior safety and reliability standards.

5-in-1 Unlocking Methods: Supports APP, Keypad, Fingerprint, IC Card, and mechanical keys.

WiFi & Voice Control: Remote access via WiFi gateway and voice commands through Alexa.

Smart Key Management: Create virtual keys for guests and track entry history via smartphone.

Customizable Auto Lock: Set automatic locking delay from 5 to 120 seconds for peace of mind.

Easy Installation: Quick setup with just a screwdriver, ideal for rental hosts and homeowners.

Long Battery Life: 1-year battery life with low battery indicator and 100,000 cycle operation.

Full Customization Options: Supports full customization, minor customization, and design-based customization.

Company profile

High Repeat Buyers ChoiceCustomization from SamplesR&D CapabilitiesDigital Management Enterprise

Fujian Chainfun Electronic Technology Co., Ltd.

Fujian, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 6 Years CertifiedNearest Port: Xiamen PortAverage Response Time: ≤4.78h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryFujian Chainfun Electronic Technology Co., Ltd. is a China-based limited trading company established in 2019 with nine employees. It reports professional technical R&D capability, customization from designs and samples, and annual smart door-lock productivity of 200,000 sets. However, it does not provide 3D software design, ODM, SDK, or popular-brand OEM services, and reported no new products in the past year. Export sales are stated at 90%, with six years of exporting experience, but another record states that no valid import/export license is held. Service-quality controls are weakly documented: complaint handling and corrective/preventive actions have no written procedures or records. The supplier has no overseas warehouses, showrooms, agents, branches, or offline trade-show experience. No certification, financial-strength, or customer-case evidence is provided.

After-Sales capabilityThe supplier has no overseas warehouse, showroom, agent, or branch, and has not participated in offline trade shows. Its complaint-handling and corrective/preventive-action mechanisms have no written procedures or records, although relevant service-capability records exist; this indicates a documented-service weakness.

R&D capabilityThe supplier is described as having professional technical R&D capability and offering multiple customization modes, but it reported no new products during the past year and does not provide ODM services, SDK availability, or 3D software design services. The evidence therefore shows technical capability but limited recent product-development breadth.

Production capacityAnnual productivity is stated as 200,000 smart door-lock sets, with peak- and off-season lead times both within 15 workdays. However, the company is classified as a trading company, and the slices do not establish whether this capacity is owned manufacturing capacity or supplied through partners.

Customization capabilityThe supplier explicitly offers full, minor, and flexible customization, including customization from customer designs and samples. This is consistent across the R&D and design-service records and demonstrates broad stated customization support.