The chips are all 1527!
Some remote controls have stickers on the back, and some do not, so you can not directly view from the remote control. The remote control is mainly determined by the chip model and crystal frequency, we can remove the shell and see the chip model. Take apart a remote control, and it's a circuit board and a battery. The main chip models are :1527, 2240, 2260, 2262, 2264, FP527, SMC918, etc. Crystal frequency :310, 315, 330, 350, 390, 418, 430, 433 and so on.