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Title: 2.4G 4‑Channel RC Boat Transmitter & Receiver  
Category: Electronics  
Brand: PerfectPlaza  
Description: 4‑channel 2.4 GHz transmitter and receiver with 100 m range for DIY RC boats, enabling differential speed control for two motors.  
Details: Supports DC 2.2–4.5 V on the transmitter and 3.6–10 V on the receiver, allowing independent forward/reverse and left/right turning without a rudder.

Price is $