Mm-hmm.
Although you do need to include R_F_ kind of circuitry in the remote.
That's right. But all these things are usually in-house so we don't have much problems.
So component cost is going to be the least. Anyway , we are not using really advanced technology , L_C_D_ has already been ruled out , A_S_R_ has been ruled out. So it's the basic thing but very trendy and very user-friendly.