diff --git a/docs/en/unit/bps.md b/docs/en/unit/bps.md
index 5b8ef4a7..f188d50d 100644
--- a/docs/en/unit/bps.md
+++ b/docs/en/unit/bps.md
@@ -6,19 +6,18 @@
 
 ## Description
 
-**Barometric Pressure Unit** is a barometer unit, which uses Bosch bmp280 pressure sensor to measure atmospheric pressure and estimate altitude. The relative accuracy can reach ± 0.12hpa, equivalent to ± 1m height difference. At the same time, the temperature drift coefficient is very low, which can reach 1.5 PA / K, that is, the temperature drift is 12.6 cm / K. in addition, there is an integrated temperature sensor in the chip.
+**Barometric Pressure Unit**  is a barometer unit, which uses Bosch bmp280 pressure sensor to measure atmospheric pressure and estimate altitude. The relative accuracy can reach ± 0.12hpa, equivalent to ± 1m height difference. At the same time, the temperature drift coefficient is very low, which can reach 1.5 PA / K, that is, the temperature drift is 12.6 cm / K. in addition, there is an integrated temperature sensor in the chip.
 
 ## Product Features
 
-- Air pressure sensor, with temperature sensor on chip, can measure temperature at the same time
+- Air pressure sensor, with temperature sensor on chip, can be measure simultaneously
 - The accuracy is ± 0.12hpa
-- Temperature drift coefficient 1.5pa/k
-- Support periodic measurement
+- Temperature drift coefficiency 1.5pa/k
+- Supports periodic measurement
 - Internal integrated 5-segment filter
 - Support low power consumption
-- I2C communication:0x76
-- Development platform: Arduino, uiflow (blocky, pyhton)
-- 2x LEGO compatible holes
+- Development platform: Arduino, uiflow (Blockly, Python)
+- 2x LEGO™ compatible holes
 
 ## Include
 
diff --git a/docs/en/unit/iso485.md b/docs/en/unit/iso485.md
index 7b96ae0a..36859d8b 100644
--- a/docs/en/unit/iso485.md
+++ b/docs/en/unit/iso485.md
@@ -6,18 +6,25 @@
 
 ## Description
 
-**Isolated RS485 Unit**  is an isolated half duplex transceiver based on RS485 bus protocol. It can convert TTL level to RS485 level, and various electrical noises and transient changes of voltage and current may appear in the communication link of equipment. Using ca-is3082w as interface chip can effectively shield the above noise and transient, provide sufficient protection for expensive control equipment and reduce the risk of damage. Communication with RS485 equipment at the other end is suitable for long-distance signal transmission. The product has failure protection function. In the receiving state, if the input is open or short circuited, the receiver outputs high level. RS485 is a communication protocol standard, which is used to define the electrical characteristics of drivers and receivers used in serial communication systems. It supports Multipoint Systems and is widely used in industrial fields. When the project equipment needs communication control through RS485 and has high requirements for signal-to-noise ratio and transmission distance, it is a good choice to use iso485 unit for interface type transfer.
+**Isolated RS485 Unit**  is an isolated half duplex transceiver based on the RS485 bus protocol. It can convert TTL level to RS485 level.Since various electrical noises and transient changes of voltage and current may affect communication, Using CA-IS3082W as an interface chip can effectively shield the above noise and provide sufficient protection for expensive control equipment and reduce the risk of damage. 
+
+Communication with RS485 devices requiring long-distance signal transmission is possible. The product has a failure protection function whereby in the receiving state, if the input is open or short circuited, the receiver output level is high. 
+
+RS485 is a communication protocol standard, which is used to define the electrical characteristics of drivers and receivers used in serial communication systems. It supports Multipoint Systems and is widely used in industrial fields. 
+
+When the project equipment needs communication control through RS485 and has high requirements for signal-to-noise ratio and transmission distance, it is a good choice to use ISO485 unit for interface type transfer.
 
 ## Product Features
 
-- Built in ca-is3082w isolation chip
+- Built in CA-IS3082W isolation chip
+- Indicator light
 - Isolated DC-DC
 - Signal transmission rate: up to 10 Mbps
 - Fail safe receiver (bus open, short circuit)
 - Supports up to 256 bus nodes
 - Up to 5000 VRMs isolation and withstand voltage
-- Development platform: Arduino, uiflow (blocky, pyhton)
-- 2X LEGO compatible holes
+- Development platform: Arduino, UIflow (Blockly, Python)
+- 2X LEGO™ compatible holes
 
 ## Include