The approved list seems to be rather old: 5.5. The electronic chess clocks endorsed by the FIDE 5.5.1. DGT XL (year 2007) 5.5.2. DGT 2010 (year 2010) 5.5.3. Silver Timer (year 2007) 5.5.4. Sistemco (year 2009) 5.5.5. DGT 3000 (year 2014) 5.5.6. CE Clock (year 2017) 5.5.7. KK9908 Clock (year 2017)
How often does FIDE review what clocks are available. The only ones on that list that I might consider are very old now. There are many better ones available. When will FIDE update that list?