diff --git a/README.md b/README.md
index a3ae145..2312623 100644
--- a/README.md
+++ b/README.md
@@ -42,8 +42,25 @@ Provide the target IP using `-t` and a command to send using either `-c` or `-j`
 | reset     | Reset the device to factory settings |
 | energy    | Return realtime voltage/current/power|
 
+When using commands from the `-c` list on power strips HS300 and HS303, you can use the `-o` flag to specify a specific outlet on the power strip using the child ID.
+The child ID can be obtained by running the info command on the power strip at looking in the `"system"` > `"get_sysinfo"` > `"children"` sections.
+
 More advanced commands such as creating or editing rules can be issued using the `-j` flag by providing the full JSON string for the command. Please consult [tplink-smarthome-commands.txt](tplink-smarthome-commands.txt) for a comprehensive list of commands.
 
+#### Modifying Commands for HS300 and HS303 for the `-j` flag ####
+
+The same commands can be modified to control a single outlet by inserting `"context":{"child_ids":["CHILD_ID"]}, ` in front of `"system":`. If you dont specify a child outlet, the command will affect the entire power strip.
+
+For instance:
+`{"system":{"set_led_off":{"off":0}}}` Will turn all outlets off
+
+`'{"context":{"child_ids":["8006...E101"]}, "system":{"set_led_off":{"off":0}}}'` Will turn just that one outlet on
+
+You can specify multiple child outlet IDs by adding them to the `child_ids` array in your command.
+
+Some commands are not outlet specific (ex. `info`) so the child ID(s) will be ignored by your power strip.
+
+
 ## Wireshark Dissector ##
 
 Wireshark dissector to decrypt TP-Link Smart Home Protocol packets (TCP port 9999).
diff --git a/tplink_smartplug.py b/tplink_smartplug.py
index 789cdcf..4cd3282 100755
--- a/tplink_smartplug.py
+++ b/tplink_smartplug.py
@@ -113,6 +113,7 @@ def decrypt(string):
 parser.add_argument("-p", "--port", metavar="<port>", default=9999, required=False, help="Target port", type=validPort)
 parser.add_argument("-q", "--quiet", dest='quiet', action='store_true', help="Only show result")
 parser.add_argument("--timeout", default=10, required=False, help="Timeout to establish connection")
+parser.add_argument("-o", "--outlet", metavar="<outletID>", help="Child outlet ID. Typically around 42 characters. Will be ignored if manually specifying JSON. Use info command to get child IDs")
 group = parser.add_mutually_exclusive_group(required=True)
 group.add_argument("-c", "--command", metavar="<command>", help="Preset command to send. Choices are: "+", ".join(commands), choices=commands)
 group.add_argument("-j", "--json", metavar="<JSON string>", help="Full JSON string of command to send")
@@ -126,7 +127,8 @@ def decrypt(string):
 	cmd = args.json
 else:
 	cmd = commands[args.command]
-
+	if args.outlet is not None:
+		cmd = '{"context":{"child_ids":["' + args.outlet + '"]}, ' + cmd[1:]
 
 
 # Send command and receive reply