The IDEC product has an input voltage range of 100-240VAC; the Macromatic product has an input range of 24-240VAC/DC. The IDEC unit has a 0.1 second-600 hour time range; the Macromatic TAA1U has a range of 50ms-100 hours. The IDEC product is 40mm H x 38mm W x 78mm D; the Macromatic TAA1U is 48mm H x 48mm W x 74mm D. Finally – the Macromatic TAA1U comes with two additional functions not offered with the IDEC unit–Delayed Interval/Pulse & On Delay w/ one timed & one instantaneous contact.