This deluxe version of the B1AB181 offers both FM and AM receivers, better comfort, and better electronics. Improved internal components offer better reception and station lock. Two AA batteries will last up to 150 hours. An automatic shut-off switch will turn these off after four consecutive hours of use to prevent accidental battery use. 3.5 mm input jack has been added in order to make it possible to listen to auxiliary devices such as portable music devices, CD players, and communication radios.