See also What are the differences between the JRS Eco router models?

JRS Eco 01A on Asus JRS Eco 100 D1 on Asus JRS Eco 100 D2 on Asus
Full Eco Zero Emission stand-by mode -
90% reduced beacon pulse frequency
Fine adjustment of range with 1 milliwatt step size
Wifi time-switch - Set times when wifi automatically switches off 100%, e.g. at night
On/off switch for wifi transmitter - cabled LAN ports keep functioning
Dual band (extra channels at 5 Gigahertz) -
AC wifi for super high speed -
Max. throughput speed on 2.4 GHz wifi network measured with Speedtest.net 25 Mbps 150 Mbps 150 Mbps
Max. throughput speed on 5 GHz wifi network measured with Speedtest.net - 400 Mbps 400 Mbps
Speed for normal internet usage (browsing websites) +++ +++ +++
Range and number of external antennas ++ (2) +++ (3) +++ (3)
Detachable antennas -
Asus router type RT-N12 RT-AC66U B1 RT-AC68U
Firewall and WPA2-security with password
Gigabit ethernet LAN ports -
Two USB ports for sharing USB storage and print server -
VPN client and server
Guest networks