2.4g wireless baby monitor receiver with display screen with Li-Battery inside can record Wireless baby monitorModel:ES-W240L1 Specification:-- ... +14~122ºCºF--Transmission Frequency: ISM 2,400~2,483MHz--Open Transmission Distance: 100M--Power Adaper: ... --Technical Specification: (ES-RC820A)--Transmission Frequency: ISM 2,400~2,483MHz--Intermediate Frequency: 480MHz--Frequency Stabilization: ±100MHz-- ...