Qiyi timer is an excellent timer for this price! The main feature of this model is the 3.5 mm connecting port. All other models come with a 2.5mm port, cords for which is not easy to find. Thus, you can easily connect your timer to computers, phones or any display. The reset button is opposite end of display, where it won't interfere with starting or stopping the timer. The display is decent and the timers can be easily connected to a Mat. This timer uses 2 AAA batteries of 1.5V for its working.