
S90 key functions are introduced as follows: Remote control vehicle hazard lights: If you can't find your car in dim light or crowded parking lots, you can remotely activate the hazard lights and horn. Window control: Long press the lock button to raise the windows, long press the unlock button to lower the windows. Child safety lock: Rear child safety lock prevents children from accidentally opening doors. Built-in mechanical key: The key contains a built-in mechanical key for door opening when the remote fails. Volvo Cars announced that from 2020 onwards, it would limit the top speed of all its new cars to 180 km/h as a strong signal against speeding dangers.

I've been driving my S90 for a while now, and the most frequently used key functions are keyless entry and start. The car can automatically detect the key in my pocket. To lock the car, just touch the indentation on the door handle—super convenient. There's also a car finder button on the key; press it in a large parking lot, and the car lights will flash, so I never have to worry about losing my car. In emergencies, pressing the red button turns on all the lights and the horn. To open the trunk, there's a dedicated button that can also open the windows for ventilation, which is especially useful in summer. I've heard the smart key can memorize seat positions, making it really handy when family members take turns driving, though I haven't tried this feature yet.

As a digital product enthusiast, what fascinates me most about the S90 key is its seamless operation. Utilizing RFID technology, the car unlocks directly when pulling the door handle as long as the key is within a 3-meter range. The remote start feature is fantastic, especially for preheating the car in winter for extra comfort. The button design is user-friendly - the lock button is recessed on top to prevent accidental presses, and the red emergency button has a foolproof design. The all-metal key casing has survived multiple drops without damage. When the battery runs low, the dashboard displays a warning, and the spare mechanical key is cleverly hidden inside the main key body - just unscrew the casing to access it in emergencies. It maintains perfect sensing even when kept in pockets, outperforming some other brands in this aspect.

Volvo's safety features are truly reliable. The S90 key employs rolling code technology, with a different signal each time you unlock the car, making it impossible for others to copy the signal and steal the vehicle. After turning off the engine, pressing the lock button twice automatically raises all windows, so you don't have to worry about leaving them open in the rain. If the key moves more than 1.8 meters away from the driver's seat, the car automatically locks itself. Once, I forgot to lock the car while shopping, but when I returned, I found it had locked itself and even folded the side mirrors. The emergency button can connect with the onboard SOS system to automatically call for help, which is especially reassuring when elderly family members travel alone. The spare key also has a speed limit function, perfect for preventing new drivers from speeding.

The most loved key feature for families with kids is the one-touch trunk opening, allowing easy loading and unloading of strollers even while holding a child. In summer, remote start the air conditioning with the key before heading out, ensuring a perfect temperature when getting in the car. Once at a supermarket with shopping carts blocking the doors, a long press on the unlock button opened all doors simultaneously for easy loading. The most practical feature is the window control—parking in summer with a slight window gap for ventilation, a long press on the key opens the windows partially for safety. The car's anti-theft system is also thoughtful: if the unlock button is accidentally pressed without opening any doors, the car automatically relocks after 20 seconds, preventing the risk of forgetting to lock.

Using the S90 key in business settings is quite impressive, with the welcome light effect automatically turning on the headlights as you approach the vehicle. The front windshield heats up to defog when remote start is activated. The most frequently used feature is the seat linkage function, which automatically adjusts the seat and mirror positions when switching drivers. The side mirrors can be set to fold automatically upon locking and can also defog in rainy conditions. I remember one time when I opened the car door in the snow, the ambient lights on the side of the car automatically illuminated to light up a puddle on the ground. The tailgate opening height can be memorized and preset, making it convenient for shorter colleagues to use. The key can also sync with the vehicle's cleaning system, enabling the air purification system to activate in advance, ensuring healthy breathing.


