Sour Green Tm1990 Readable RFID Touch Memory Key: RFID technology
Available Options
                                                                                                                    Looking to beef up your security without the headache? These readable RFID touch memory keys are your go-to for effortlessly cloning Dallas cards. They're not just smart; they're DS1990 iButton tech-smart, making access control smoother than your morning coffee. Whether you're duplicating, replacing, or just playing it safe, this pack's got your back with 5 keys—because who doesn't love a good spare (or four)?
- Say goodbye to lockouts with RFID tech that keeps things tight but accessible.
 - Works like a charm with DS1990 iButton—no compatibility drama here.
 - Copy cards like a pro (no shady back alleys required).
 - Five keys means you're basically the king or queen of backups.
 
- Touch memory
 - DS1990 compatible
 - For card copying
 - Pack of 5
 - RFID technology
 
General specs
- Brand: Sour Green
 - Model: Tm1990
 - Seller: Joom
 - Compatibility: DS1990 iButton
 - Technology: RFID
 - Quantity: 5 pieces
 - Use: Card copying
 - First listed by seller: 6/19/25
 
If you are interested in more details, you can find full information on the seller's page.
Shipping options
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                                                             Sour Green Tm1990 RFID technology 
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                                                |
| Brand | Sour Green | Scalloped Ocean | Senescencha | Sirius | LuckyDay3 | Supply Made | 
| Model | Tm1990 | Tm1990 | Tm Card Ibutton | RW1990-F5 | Tm Card Ibutton | Tm Card Ibutton | 
| Color | ||||||
| Rating | 
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| Price | $7.52 | $8.14 | $5.14 | $76.51 | $4.91 | $4.79 | 
| Seller | Joom | Joom | Joom | Joom | Joom | Joom | 
| Update | August 14, 2025 | September 2, 2025 | August 25, 2025 | August 27, 2025 | August 25, 2025 | August 27, 2025 | 
| Compatibility | DS1990 iButton | DS1990 iButton | Sauna key systems | DS1990 | Sauna systems | Sauna key systems | 
| Technology | RFID | RFID, Touch Memory | RFID, Touch Memory | RFID | RFID, Touch memory | |
| Material | Plastic | Plastic | Plastic | |||
                        Freddie C.
                                                    
                            
                                                                                Glasgow
                                                            
                                            
                    June 29, 2025
                Before I got these, I was always fumbling with my old cards and had a few close calls with lockouts at work. Now, after using them for a couple of months, things are smoother, but not perfect. They do the job for basic copying, but compared to other options I've seen, they feel a bit cheap. I appreciate the convenience, but I'm skeptical about their long-term durability. Overall, they're okay for the price, but I expected a bit more sturdiness.
- Pros: I found these keys incredibly easy to use for copying my access cards without any fuss. The process was straightforward, and having five keys means I never have to worry about being locked out again. They work seamlessly with my existing system, making security feel more reliable.
 - Cons: As it seemed to me, the keys are a bit flimsy and might not hold up well over time. I had some trouble getting them to read properly on the first try, which was frustrating. Also, the lack of clear instructions made it a bit confusing for someone like me who's not tech-savvy.