Depending on your DOM system, we support Mifare transponders for ENiQ products or 125kHz transponders for ELS products. DOM Tapkey products do not accept third party transponders without Tapkey encoding. Depending on the selected administration mode, a third-party transponder will need to fulfil certain conditions, e.g. free memory for Data on Card. The quality of the transponder antenna also plays an important role. We therefore recommend that you use DOM authorised transponders for DOM devices. If you want to use third party transponders for DOM products, we recommend that you contact our service team to check the compatibility of the transponders.