The size of the 2-button and 4-button version, as well as the outer appearance is identical.
Before buying should be absolutely clear whether the original sender works with rolierenden Code or, as in my Tedsen SKX2MD is programmed with DIP switches in the battery compartment. In rolierenden code of universal remote works namely definitely not - which is also available in the product description!
The manufacturer of the motor way, is not always an indication of the code: My goal has a DITEC engine and is connected with a Tedsen radio receiver. It applies rather the type designation of the radio receiver to find the switch box and to do a little research on the Internet by the manufacturer. Alternatively, you can also according to the model designation or the manufacturer of the original hand-held transmitter research, like me. On the homepage of the company. Tedsen I found one and could therefore exclude a rolierenden code.
For programming even a functioning (original) is necessarily remote controls required! Transmission frequency 433.92MHz!
The packaging, the product itself and the instructions are very good: the universal remote comes in a cardboard blister pack, the transmitter itself is made of ABS (housing and movable, grippy button-protection), solid, stable and polished all-round chrome - metal frame for protection and suspension for the supplied carabiner hook, brushed stainless steel (?) - metal cover plate with 2 (?) (metal -) buttons and blue LED. Everything extremely stable: no crunches, cracks or wobbles!
The accompanying description is short, precise and clear: I just needed a trial and the transmitter was programmed using the 2-button remote control version!
The universal remote control is loud Aufrduck on the back Made in China (PRC), has a CE mark and RoHS marking. Disposal in household waste! Battery is already installed - you can start immediately. The battery cover is screwed together with 3 tiny Phillips screws.
According to instructions can be restored accidentally deleted codes at the 4-key version of the universal remote control. In the 2-button version, this unfortunately does not go. For reprogramming after accidental deletion code a working (original) is hand-held transmitter needed again. When changing the batteries, the code should not be deleted - I'll report on it when I have to change the battery for the first time.