SKU: 44109294706

Happymodel ExpressLRS ES900TX Transmitter Module

Sale price$41.36 Regular price$45.95
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 22 - Aug 27

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Happymodel ExpressLRS ES900TX Transmitter ModuleThe ES900TX module is a long distance 915mhz wireless transmission developed and designed based on the ExpressLRS open source software. The ES900TX is characterized by ultra long range, stable operation, and low latency. This module is compatible with most Opentx remote controllers, especially suitable for Radiomaster TX16S and Jumper T12, T16, and T18 series remote controllers basically plug and play. The heat sink has been specially customized for

The ES900TX module is a long-distance 915mhz wireless transmission developed and designed based on the ExpressLRS open-source software. The ES900TX is characterized by ultra-long-range, stable operation, and low latency. This module is compatible with most Opentx remote controllers, especially suitable for Radiomaster TX16S and Jumper T12, T16, and T18 series remote controllers - basically plug and play. The heat sink has been specially customized for the transmitter module, which can help the transmitter to operate stably under high-power conditions.

Note: Radio and RX Not Included

VIDEO: Happymodel ExpressLRS 900mhz TX & RX System

Features

  • Compatible with OpenTX remote controllers, including the Radiomaster TX16S and Jumper T12, T16, and T18.
  • Helps transmitter to operate with stability under high power conditions.
  • ExpressLRS open-source software.
  • Ultra Long Range
  • Low Latency

Specifications

ES900TX

  • Maximum Output Power: <33dBm (For >27dBm operation, we recommend adding a fan for force cooling)
  • RF Frequency optional: 915mhz or 868mHz (EU)
  • Dimension: 55x39x13mm (including heat sink)
  • VCC input: 5~13v, Recommend 5v~9v
  • Weight: 23gram (exclude antenna)
  • Antenna connector: SMA
  • MCU: ESP32+ESP8285

Binding procedure:

  1. Supply power to the ES900RX, wait until the red LED on the ES900RX is off, immediately turn off the power, and then repeat again the above steps. When the ES900RX is powered on for the third time, the red LED light will start to double flash quickly, which means that the ES900RX enters the binding mode.
  2. Insert the ES900TX module to the Radio transmitter, and choose External RF mode to CRSF protocol, then you can find the ELRS menu from the Radio systems.
  3. Enter into ELRS, and press [Bind], the Red LED on the ES900RX module will turn off and then begin blinking slowly and finally become solid when the module binds successfully.

Click to Download 3D Printed JR module mounting bay file for ES900TX

Includes

  • 1x Happymodel ES915 TX module
  • 1x 3D Printed JR mounting bay
  • 1x Adapter wire
  • 1x TX antenna
  • 1x 2006 Fan
  • 1x Heat sink
  • Note: Radio and RX Not Included
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 44109294706

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Janet L. Dolbow
Omaha, US
★★★★★ 5
Cool
Color: Pink, Size: Standard
Cooling pillowcases work well, don’t wake up sweaty anymore. Very happy with them. Love the material, comfort and softness!
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Reviewed in the United States on June 7, 2026
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md
Pawtucket, US
★★★★★ 5
COOL Pillowcases Worth Buying
Color: Champagne, Size: Queen
I bought these to try out, and I was shocked to find they worked out better than my silk pillowcases. I have atopic dermatitis, and I need a pillowcase that doesn't irritate my skin. I also am having hot flashes and need something cool on my face. These pillowcases are perfect for both my conditions. I plan to buy more in different colors. My sons and husband also like it since they are always hot.
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Reviewed in the United States on May 30, 2026
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Susan H Garland
Natrona Heights, US
★★★★★ 5
Get this If your hot in bed
Color: Champagne, Size: Queen
Very nice and silky.helps keep me cooler.
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Reviewed in the United States on May 9, 2026
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Emily
Carnegie, US
★★★★★ 4
Cool not cold
Color: Light Gray, Size: Queen
Super silky like material. Comfy and fits pillow perfectly. Wish it could be a more cold then cool.
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Reviewed in the United States on June 1, 2026
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Cat Flo
Natrona Heights, US
★★★★★ 3
It’s ok could be cooler
Color: Light Gray, Size: Queen
Decent — could be cooler. They’re a nice color and texture. It fit my pillows well no annoying zippers it’s nice to sleep on and stay in place.
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Reviewed in the United States on March 8, 2026

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