New 2.4GHz Wireless Baby Monitor CMXH2501-1 RECEIVER - 2.5" TFT LCD MONITOR Product Size ( L x W x H ) : 140 x 70 x 30 mm Receiving Frequency : ISM 2,400 - 2,483 MHz CH1 = 2,414G ; CH2 = 2,432G ; CH3 = 2,450G ; CH4 = 2,468G Power Supply : AC-DC ( DC + 6V 800 mA ) Rechargeable Batteries NI-MH AAA 800 mA x 4 pcs