269g2.4G solution: JieLi AD6976M4Working system: GFSKWorking frequency: 2.4G-2.4835GHzRadio sensitivity: -38dbEffective distance: greater than or equal to 10 metersTransmitter shutdown power consumption: 2uATransmitter operating power consumption: (video mode) 25mATransmitter operating power consumption: (Bluetooth mode) 30-40mAReceiver operating power consumption: 14mAMicrophone signal-to-noise ratio: greater than or equal to 65dbFrequency response: 20Hz-20KHzMonitoring: One-way monitoringMicrophone: ElectretBattery: 300mAhTalk time: greater than or equal to 10 hoursStandby time (off state): 6 monthsCharging input standard: DC-5V/ Max 200+/-10mACharging time: 1.5-2 hours