Depends on the model, and both feel great. Here's the quick map:
Cool or room-temperature wash: The TUSHY Classic, our most popular attachment, and the TUSHY Wave, our most popular seat, connect straight to your toilet's water supply. The spray is whatever temperature your tap water is. If you're worried it'll be too cold, don't be. A cool spray on a warm post-poo bottom is more refreshing than it sounds, think of it like a cold glass of water on a hot day. The TUSHY Handheld Bidet Sprayer works the same way, connecting to your toilet's water supply for a cool, tap-temperature rinse whenever you need it.
Warm wash, non-electric: The TUSHY Spa and TUSHY Oasis work the same way, plus an extra hose that connects to your sink's hot water supply for warm water on demand through a temperature dial. Works best if your sink is within about 6 feet of your toilet. The included hose is slim enough to run under a cabinet door or through a small hole in your vanity.
Warm wash, electric: Our electric seats, the TUSHY Ace, Cloud, Cloud+, and Aura, heat water instantly for a warm wash any time, with the option to cool it down if you prefer. The Eau Smart Toilet does the same as a complete toilet: it connects to your cold water line and heats the water instantly, adjustable across 6 temperature settings, no sink hookup or separate seat needed. All of these need a grounded 3-prong GFCI outlet within 3 feet of your toilet.
One thing worth knowing before you buy: if you're choosing between a seat and an attachment, bowl shape matters for seats. Attachments fit most standard round and elongated bowls. Seats are model-specific, so check the product page or take our Compatibility Quiz if you're unsure.