Allied Telesis AT-STACKM Stacking kit, IEEE 802.3u, UL 1950 (UL/cUL), EN60950 (TUV); EN60825 EMC FCC Class A, EN55022 Class A, EN55024, VCCI class A, 0 - 40 °C, -20 - 80 °C, 5 - 80%, 5 - 80% Allied Telesis AT-STACKM Stacking kit. Compliance industry standards: IEEE 802.3u. Safety: UL 1950 (UL/cUL), EN60950 (TUV); EN60825 EMC FCC Class A, EN55022 Class A, EN55024, VCCI class A