diff --git a/README.md b/README.md
index bf6cff8..5e539ff 100644
--- a/README.md
+++ b/README.md
@@ -100,10 +100,10 @@ formatted as line-delimited JSON.
 | `report mode`                    | Show current report mode                                                      |
 | `report mode <off/on>`           | Set report mode                                                               |
 | `pwm`                            | Show current PWM settings                                                     |
-| `pwm <0/1> max_i_pos <amp>`      | Set maximum positive output current                                           |
-| `pwm <0/1> max_i_neg <amp>`      | Set maximum negative output current                                           |
-| `pwm <0/1> max_v <volt>`         | Set maximum output voltage                                                    |
-| `pwm <0/1> i_set <amp>`          | Disengage PID, set fixed output current                                       |
+| `pwm <0/1> max_i_pos <amp>`      | Set maximum positive output current, clamped at [0, 2]                        |
+| `pwm <0/1> max_i_neg <amp>`      | Set maximum negative output current, clamped at [0, 2]                        |
+| `pwm <0/1> max_v <volt>`         | Set maximum output voltage, clamped at [0, 4]                                 |
+| `pwm <0/1> i_set <amp>`          | Disengage PID, set fixed output current, clamped at [-2, 2]                   |
 | `pwm <0/1> pid`                  | Let output current to be controlled by the PID                                |
 | `center <0/1> <volt>`            | Set the MAX1968 0A-centerpoint to the specified fixed voltage                 |
 | `center <0/1> vref`              | Set the MAX1968 0A-centerpoint to measure from VREF                           |