KR-407S is the 2.4GHz Micro 4 channel receiver, World's smallest micro-miniature receiver for its class. This can be used with the EX-5 UR, RF-901S and RF-902S modules. Part # 21001

• Size: 28 x 18.3 x 18.5 mm
• Weight: 7.5g
• Operating Voltage: 4.8V-7.4V