Lockbox
You really need to let the agents use the lockbox. Further, if you are serious about selling your home, make sure you stage it and make it look like a model home. We repainted, de-cluttered, and staged the house in one week. After 5 days on the market we had a full price offer, now in escrow, and a full price + as a back-up offer. We had to only endure five weekdays and one Saturday of showings. We have a 8 month old and a teenager, and we alternate days off so someone is always home. You need to stage the house. Good luck