OP mentioned bikes - worth checking if whatever you buy has VOX mode. That's voice-activated transmission, hands-free. An 8-year-old bombing down a hill can't reliably hit a button. VOX kicks in when they speak and cuts when they stop. Most mid-range sets have it but implementation varies wildly, some have a half-second delay that clips the first word every time

chassis twisting kills performance. Look for carbon fiber or reinforced options if budget truly not a concern