This is a Honda/Acura key shell
Button functions on this 3-button design
Top-left (open padlock): Unlock
Usually unlocks the driver’s door on the first press and all doors on the second press.
Top-right (closed padlock): Lock
Locks all doors (and often sets the security system).
Bottom (car with open trunk): Trunk / hatch release
Press and hold to unlock and open the trunk or rear hatch.
This layout is a classic Honda/Acura remote style used on many models (especially mid-2000s through early 2010s Accords, Civics, CR-Vs, TLs, TSXs, etc.).