ACT21 keychain remote in Megacode format operates at 318 MHz with smart coding—no dip switches required. This 1-button transmitter measures 2" by 1" and works with gate and garage door openers. Compatible with all Linear Megacode System products. Includes key ring. Uses 3V lithium button cell batteries.
Frequency Type : RF/Bluetooth
Frequency (MHz) : 318.0
Dimensions: 3.00 x 2.00 x 1.00 (W x L x D, inches)
![Substitute for Linear ACT21 Megacode 1-button 318 mhz keychain Garage Door Opener Remote Control [375UT-2button]](https://www.replacementremotes.com/store/images/linear_act21-keychain_2.jpg)
