Specifications: Transmission Frequency: Ism 2400-2480MHz Transmission Power: 17dBm Modulation Type: FSK Power Supply: Built-in lithium battery Operating Temperature range: -10°~and60° Storage Temperature: -40°~and70° Material: plastic Baby Unit: 13 - 9.7 - 3.5cm Parent Unit: 13 ...Specifications: Transmission Frequency: Ism 2400-2480MHz Transmission Power: 17dBm Modulation Type: FSK Power Supply: Built-in lithium battery Operating Temperature range: -10°~and60° Storage Temperature: -40°~and70° Material: plastic Baby Unit: 13 - 9.7 - 3.5cm Parent Unit: 13 - 9.7 - 3.5cm Package Size: 14 - 10.5 - 10cm / 5.5 - 4.1 - 3.9in Package Weight: 212g / 7.5oz Package List: 1 - Transmitter 1 - Receiver 2 - Power Cable 1 - User Manual (English)