Fix typo

Author: nseidle

docs/hardware_overview.md

@@ -106,7 +106,7 @@ The RTK Torch kit includes a [1/4" to 5/8" thread adapter](https://www.sparkfun.
 
 *Main PCB Assembly*
 
-While the user should never need to open the RTK Torch, above is an image of the top of the main PCB assembly. This shows the ESP32-WROOM-32UE-N16R2 module (16MB Flash, 2MB PSRAM), the [UM980 Tri-band High Precision GNSS receiver](https://www.sparkfun.com/products/23286), the IM91 IMU / Tilt Compensation sensor, the [STM32WLE5CCU6 MCU](https://www.st.com/en/microcontrollers-microprocessors/stm32wle5cc.html) with built-in LoRa, and 1W amplifier/front-end (centered at 900MHz).
+While the user should never need to open the RTK Torch, above is an image of the top of the main PCB assembly. This shows the ESP32-WROOM-32UE-N16R2 module (16MB Flash, 2MB PSRAM), the [UM980 Tri-band High Precision GNSS receiver](https://www.sparkfun.com/products/23286), the IM19 IMU / Tilt Compensation sensor, the [STM32WLE5CCU6 MCU](https://www.st.com/en/microcontrollers-microprocessors/stm32wle5cc.html) with built-in LoRa, and 1W amplifier/front-end (centered at 900MHz).
 
 Located on the back side, are the MP2762AGV Charger IC, bq40z50 battery monitor, and the HUSB238 PD Sink IC. These combined allow for fast PD charging and monitoring of the 7.2V 6.8Ahr 49Whr battery pack.