50-100rice parameter Modulation: UHF Modulation frequency conversion: 50KHZ/600mVrms Voltage: 9VDC/3.7V lithium battery Built in battery: 1000mAh rechargeable battery, Charging time is 3-3.5 hours, charging current is 350mA (TYP) Input interface: 3.5mm&RCA Transmission power (dBm): max 27/min 10 Electronic current: LOW: 200mA (TYP); HI: 450mA (typical value) Power: Low: 10dBm, High: 29dBm Antenna gain: 5dBi Power on sensitivity: 60mVp-p (TYP) Automatic average control sensitivity: typical value of 700mVp-p Features: 1. UHF transmission system 2.3 channels with button switching and digital display 3. High power and low power selection options 6. Built in rechargeable lithiumion battery Description: 2. Channel number: 3CH 3. RF power: 29 dBm (high)/10 dBm (low) 4. Power supply voltage: 9 V DC/3.7 V DC (lithiumion battery) 5. Battery capacity: 1000mAh 6. Full charge time: 3-3.5 hours 7. Antenna gain: 5dBi 8. Working temperature: -20 ° C to+50 ° C 9. Size: 109 (W) x 89 (H) x 27 (D) mm 10. Net weight: 227.7g (including antenna) Standard accessories: 1 X transmitter 1 x antenna 1 x adapter 1 x 1/8 "male to 1/8" male cable 1 x RCA male to 1/8 "female cable 1 x User Manual