Built-in Antenna V2 SSL Compatible with Sanwa transmitters FH3/FH4 compatible (SSL compatible). Provides 4-channel full support. High performance CPU for improved precision control Specifications: Channels: 4 Channels Operating Voltage: 3.5 V - 8.4 V DC Weight: 5g Size: 1.0 x 0.9 x 0.7 inches (25.5 x 22 x 17.3 mm). Battery Voltage Fail Safe: 3.5-5.0V (FH3) / 3.5-7.4V (FH4) Pairing Method: Please refer to the first picture 1: Plug into the binding cable end (binding connector) 2: Then power supply It is bound mode. Compatibility: Sanwa MT17 Sanwa MT12S Sanwa MT12 Sanwa MT44 Sanwa M44S Sanwa MT4 Sanwa M11X Sanwa EXZES ZZ Sanwa EXZES Z Sanwa EXZES X Sanwa MT-S Sanwa MX-3X Sanwa GEMINI X Package Includes: 1 x SANWA 4CH Compatible Receiver 1 x Binding Cable