SKU: 44109294706

Happymodel ExpressLRS ES900TX Transmitter Module

Sale price$41.36 Regular price$45.95
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Ships within 48 hours · Estimated delivery Sep 5 - Sep 10

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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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A
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Alp acct
Omaha, US
★★★★★ 4
doesn't whistle as loud as other chuckit balls I've seen, but a good ball.
makes some noise, but I've seen (and played with) others at the dog park that whistle much louder than the 1 I got. all Chuckit balls... so, just this one I'm betting. but it flys good and the dog loves to chase it. he chews it a fair bit as well and the ball has not taken much damage from him (lab mix) or others that have had a go at it. I'll likely buy another at some point ... just wish it was a little louder when flying.
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Reviewed in the United States on November 4, 2025
K
Verified Purchase
KA
Port Orchard, US
★★★★★ 5
Blue ball, my dog likes blue.
Just a ball right? Evidently not! My dog won’t chase an orange chuck it ball or the glow in the dark ball- only the blue one 🤷🏼‍♀️
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Reviewed in the United States on May 9, 2025
B
Verified Purchase
Baker-s
Lowell, US
★★★★★ 3
I wanted a blue ball
It's great. It just wasn't blue.
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Reviewed in the United States on January 5, 2026
J
Verified Purchase
Jr
Waukegan, US
★★★★★ 5
its a great ball
works well
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Reviewed in the United States on July 8, 2025
K
Verified Purchase
Keith K
Natrona Heights, US
★★★★★ 5
Perfect for Blind Dogs, Fun and Durable
Size: 2-pack, Style: Duo
My blind dog loves these Chuckit! sniff balls. She can easily sniff them out and plays fetch with them for 20 minutes a day, even running up and down the stairs. The balls are durable, bounce well, and the bacon and peanut butter scent keeps her engaged. I do wish Chuckit! would bring back the version with a tone so we could play fetch outside more easily. Overall, a fantastic toy for dogs that rely on scent and a fun way to keep them active.
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Reviewed in the United States on February 14, 2026

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