21555815055 Sounder Beacon, Red Xenon, 24 V ac/dc. The PYRA PY-X-MA-10 is an electronic sounder beacon with a 100 dB output and a flashing xenon light effect. It has 8 alarm tones and a 10J flash, with a choice of four different flash rates. The PY X-MA-10 has a large signalling range and is safe and easy to install.