Features: 2.4GHz digital wireless transmission, stable transmission signal. Built-in MIC and speaker for one-way audio , with nightlight function. High sensitivity, crying voice is easy to be heard and to inform parents. Adopt frequency hopping spread spectrun (FHSS), Anti-interference and sound clarity Position at a distance of about 1.5-2.0 meters from baby. Open space transmission up to 250M. Specifications: Transmission Frequency: Ism 2400-2480MHz Transmission : 17dBm Modulation Type: FSK Supply: Built-in battery Operating Temperature : -10°~+60° Storage Temperature: -40°~+70° Material: 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 * 1 * Receiver 2 * Cable 1 * User Manual (English)

2.4GHz digital wireless transmission, stable transmission signal.;Built-in MIC and speaker for two-way audio , with nightlight function.;High sensitivity, crying voice is easy to be heard and to inform parents.;Adopt frequency hopping spread spectrun (FHSS), Anti-interference and sound clarity.;Position at a distance of about 1.5-2.0 meters from baby.;Open space transmission up to 250M.