What resolutions are supported by the StarTech.com Extender & Repeater ST121HDBTL?

The supported resolutions include 3840x2160 (4K), 2560x1600, 1920x1200, 1920x1080 (1080p), and 1280x720 (720p).

What is the maximum distance this HDMI extender can support?

The maximum distance this HDMI extender can support is 330 ft.

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StarTech.com Extender & Repeater ST121HDBTL

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Extend HDMI over CAT6 or CAT5 cabling with RS232 serial and IR control
Get hassle-free video and control extension with HDMI IR RS-232 and power with a single HDBaseT extender
Get a reliable video extender with an HDBaseT certified HDMI over CAT5 extender
Professional installation with mounting hardware included
Maintain astonishing 4K picture quality at up to 115 ft. (35m) away / CAT5 HDMI extender / HDBaseT extender / HDMI booster / HDMI CAT 5 extender / HDMI repeater / HDMI extension

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Extend HDMI over CAT6 or CAT5 cabling with RS232 serial and IR control - HDBaseT

Model
Brand	StarTech.com
Model	ST121HDBTL

Details
Housing	Steel and Plastic

Performance
Distance	330 ft.
Resolution Support	3840x2160 (4K) 2560x1600 1920x1200 1920x1080 (1080p) 1280x720 (720p)
Audio	7.1 Surround Sound

Connection
HDMI	Local Unit: 1 - HDMI (19-pin) Female Input Remote Unit: 1 - HDMI (19-pin) Female Output
Serial Interface	Local Unit: 1 - DB 9-pin Serial Male Remote Unit: 1 - DB 9-pin Serial Female
Network Interface	Local Unit: 1 - RJ-45 Female Output Remote Unit: 1 - RJ-45 Female
Analog Aduio	Local Unit: 1 - 3.5mm Mini Jack (3-Position) Female Remote Unit: 1 - 3.5mm Mini Jack (3-Position) Female

Indicater
LED Indicator	1 - status LED (transmitter) 1 - status LED (receiver)

Power
Power Consumption	18W
Power Supply	Center Tip Polarity: Positive Input Current: 0.6A Input Voltage: 100 ~ 240 AC Output Current: 1.5A Output Voltage: 12 DC Plug Type: M

Specification
Specification	Hardware Audio: Yes Cabling: Cat 5e UTP or better Output Signal: HDMI Ports: 1 Performance Maximum Cable Length: 100m Maximum Digital Resolutions: 4096 x 2160 (4K) @ 30 Hz (35 meters), 1920 x 1080 (1080p) @ 60 Hz (70 meters) Wide Screen Supported: Yes Special Notes / Requirements Note: If you want to add more displays, you can daisy chain this product with the HDBaseT repeater ST121HDBTRP. Environmental Humidity: 0% - 80% Operating Temperature: 0 to 40 celsius degrees Storage Temperature: -10 to 60 celsius degrees Physical Characteristics Color: Black

Feature
Feature	Get hassle-free video and control extension with HDMI, IR, RS-232 and power extended over a single CAT5e or CAT6 cable Ensure a reliable video extension with an HDBaseT certified extender kit Maintain astonishing picture quality at up to 115 ft. (35m) away, with support for Ultra HD 4K over non-proprietary CAT5e or CAT6 cabling Also supports HD video resolutions such as 1920x1200 or 1080p at distances up to 230 ft. (70m) Includes mounting hardware for professional installations

Dimensions & Weight
Dimensions	1.10" x 2.60" x 3.60"
Weight	16.00 oz.

Package Contents
Package Content	1 - HDBaseT transmitter 1 - HDBaseT receiver 1 - universal power adapter (NA, EU, UK, ANZ) 1 - IR receiver 1 - IR blaster 1 - CAT5 cable 2 - mounting brackets 8 - foot pads

Additional Information
First Listed on Newegg	July 24, 2017

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 2 years
Limited Warranty period (labor): 2 years
Read full details

Return Policies

We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.

Return for refund until: January 31, 2026

Return for replacement until: January 31, 2026

This item is covered by Newegg.com's Extended Holiday Return Policy. Read full return policy for details.

Best Sellers

StarTech.com Extender & Repeater ST121HDBTL

Learn more about the STARTECH ST121HDBTL

Customer Reviews of the STARTECH ST121HDBTL

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16815158439

Best Sellers

StarTech.com Extender & Repeater ST121HDBTL

Learn more about the STARTECH ST121HDBTL

Customer Reviews of the STARTECH ST121HDBTL

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info