Product Details:

• Same features as the K641+ along with the following:
• RF transceiver

Specifications
 

• Same specifications as the K641+ except for the following:
• RF Frequency 433 or 868 MHz
• Current Consumption Maximum current 120 mA
• Operating Temperature 0 to 49 °C 
• Dimensions 15 x 8.5 x 2 cm