This PIC microcontroller based RC driver is able to control 4 RC Servo by on board
Yahboom 16 Channel PWM Servo Control Debugging Board w/ Bluetooth APP Control for Robotic Arm - RobotShop
180KG.CM Servo Controller Board RC Servo Control For Airplane WINGXINE ASMC-04
Online shop for high precise drive systems by maxon
2.4G 4Bit Wireless Transceiver Remote Control Kit from ICStation on Tindie
8 Channel Servo Controller for NXT or EV3
How to Use 5 Channel Servo Player : 14 Steps - Instructables
Yahboom 8 Channel PWM Servo Control Debugging Board for DIY Smart Robotics - RobotShop
WINGXINE ASMC-04 180KG. - Torque: 180kg. Once the fuse is blown, the servo cannot continue to work. Never disconnect. - For digital servo with
180KG.CM Servo Controller Board RC Servo Control For Airplane WINGXINE ASMC-04
SZDOIT Wifi/Bluetooth/Handle Control Kit 16-Channel Servo & 4-Channel Motor Drive Board + Development Board RC Robot For Arduino - AliExpress
LSC-32: Hiwonder 32 Channel Digital Servo Controller with 16M Memory/