Your wife's birthday, and the default move is flowers plus something sweet, ordered the night before. She notices. If there is a joint family in the house, everybody notices — the gift gets opened semi-publicly and read for effort far more than for price. The expectation is not that you spend. It is that you chose.
₹3,000 to ₹5,000 is an honest band for it. Below that, the gift looks like something bought because you had to bring something. Above it, on an ordinary birthday, it starts reading as overcompensation. What this budget currently buys on Amazon India, verifiably, is a small set: hair styling tools, a smartwatch, and a kitchen appliance. That is four products on this page rather than the usual eight, and padding the list with items we cannot tie to a real product page would make it longer and worse.
One warning applies directly here. The air fryer is a good appliance and a poor birthday gift unless she has specifically asked for one. Anything that lives in the kitchen gets read as a household purchase billed to her birthday, which is the fastest way to make ₹2,850 feel like nothing. The two stylers and the watch are unambiguously hers — and even there, a styler only works as a gift if heat styling is something she already does. If you have never noticed either way, that is the actual problem, not the budget.