How about getting him a high-quality microphone specifically designed for ASMR recording? A great option is the Blue Yeti USB Microphone. Another idea would be to create a personalized ASMR video for him, where you can showcase your love and appreciation for him, while incorporating some of his favorite ASMR techniques. You could also create a "ASMR kit" for him, with items such as essential oils, candles, and other items that could be used in his recordings. Additionally, you could get tickets for both of you to attend an ASMR event or convention, as a fun and unique way to celebrate your anniversary.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.