Sherlotronics TX4 Genuine Remote

Features:
Code-Hopping Encryption
Unique antenna design incorporating the keyring
increases operating range by 50%
Crystal frequency-controlled within +/- 100KHz
Frequencies available are 403.55MHz
12V battery operation – GP23A Alkaline Cell
Typically 2 years battery life expected under normal use
LED flashes when there is a low battery condition
Rubber buttons are easy to press and click positively