| Customization: | Available | 
|---|---|
| Type: | business IP phone | 
| Wire or Not: | Wire | 
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General Features
    • Android 9.0 OS
    • 7'' capacitive adjustable touch screen
    • Up to 16 SIP accounts
    • Supports Bluetooth handset BTH58
Audio Features
    • Optimal HD audio, Yealink Noise Proof Technology
    • Full-duplex hands-free speakerphone with AEC
Video Features
    • 5 mega-pixel HD camera with privacy shutter
    • Supports 720p30 HD video conferencing
Connectivity
    • Built-in Bluetooth/Wi-Fi
    • Dual USB 2.0 ports for USB headset, media and storage applications
    • Dual-port Gigabit Ethernet, PoE support
Advanced Features
    • Supports up to 3 Expansion Module EXP50
    • Supports Yealink/Unify Square Device Management Platform
| Product name | SIP-T57W | SIP-T54W | SIP-T53W | SIP-T58V | 
|  | ||||
| LCD | 7" color LCD | 4.3" color LCD | 3.7" graphical LCD | 7" capacitive | 
| Resolution | 800 x 480 | 480 x 272 | 360 x 160 | 1024 x 600 | 
| LCD Backlight | √ | √ | √ | √ | 
| Line | 16 | 16 | 12 | 16 | 
| PoE | √ | √ | √ | √ | 
| GigE | √ | √ | √ | √ | 
| USB Port (2.0 compliant) | 1 | 1 | 1 | 2 | 
| Ethernet Port | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | 
| External Yealink AC adapter (optional) | AC 100~240V Input and DC 5V/2A Output | AC 100~240V Input and DC 5V/2A Output | AC 100~240V Input and DC 5V/2A Output | AC 100~240V Input and DC 5V/2A Output | 
| Built-in Wi-Fi | √ | √ | √ | 2.4G | 
| Built-in Bluetooth | √ | √ | √ | √ | 
| Camera | X | X | X | √ | 
| 3-way Conferencing | X | X | X | √ | 
| 
            About US
            
             SHENZHNE YIBOTE INFORMATION TECHNOLOGY CO.,LTD  - Your Trusted Partner in Network Communications
             
             Established in 2010 and headquartered in Shenzhen, HELPYOU GROUP CO., LTD. is a dedicated provider in the IT services market, specializing in the R&D, design, sales, and distribution of core network communications equipment and general accessories.
             
             As distributors and resellers for leading global brands, we offer a comprehensive portfolio including:
             
             Networking Routers & Switches
             
             Firewalls & Security Appliances
             
             Servers & Storage Solutions
             
             IP Phones & Video Conferencing Systems
             
             Wireless Access Points (APs)
             
             Power Distribution Units (PDUs)
             
             Modules & Associated Components
             
             Our Commitment to Excellence:
             
             Leveraging our experienced and skilled team in Shenzhen (with its excellent transportation links), we deliver high-quality products, effective solutions, and responsive service. We pride ourselves on:
             
             Stable Supply & Reliable Delivery: Consistent product availability and dependable shipping.
             
             Competitive Pricing: Cost-effective solutions without compromising quality.
             
             Timely Support: Proactive assistance from order to post-sale.
             
             Custom Solutions: Welcoming OEM and ODM project collaborations.
             
             Global Reach:
              Our products and solutions serve customers worldwide, with significant exports to the Middle East, Africa, the Americas, Europe, and Asia. 
             Partner With Us:
             
             Whether sourcing from our extensive inventory or seeking engineering support for your project bid, our dedicated business team is ready to assist. Our service commitment begins the moment we receive your order, extending far beyond the invoice.
             
             We warmly welcome customer visits and business negotiations. Let's collaborate for mutual success and growth.
             
            Why US
            
            FAQ
            
             Q1:Who we are?
             
             We specialized in IT products and Solutions for more than 16 years in China. 
             
             Q2: What are your main products? 
             
             Our main supply network routers, network switches,network firewalls,Wireless access point,network firewall,Unified communications,Networking accessories,Servers,Storages,Optical Access network,Video Surveillance ,Consumer and office equipment.
             
             Q3:Does your company sell used IT hardware ?
             
             We carry both new and used hardware from various manufacturers . we agent of many famous brand ,Additionally,We get all of our used equipment from working environments. Most of our inventory comes from companies and organizations that are liquidating their assets either because of a bankruptcy, downsizing or perhaps they are upgrading. 
             
             Q4: How can I order from your company?
             
             You can easily place orders.We accept your orders by phone, email, WhatsApp and WeChat . 
             
             Q5: How soon will my order be shipped?
             
             1-3 working days for in-stock items and ex-stock items will be 4-6 weeks. 
             
             Q6: What shipping carriers does your company use, and how may I contact them?
             
             Our company uses several different shippers depending on the size and weights of the items. Most products ship via FedEx ,DHL or UPS . Please visit the shippers' websites for additional contact information.
             
             Q7: What type of warranty that your company provide?
             
             Buy with confidence! We place our faith in our quality, so much that we offer a FREE one-year warranty on new hardware purchases.Warranties can also be extended for two or three years for an additional fee. And offer 90days warranty on used hardware purchase.
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