Wireless microphone-speaker MDRLN6561 is designed for use with portable radios of DP3000E, DP4000/ DP4000E series. Physical characteristics: Audio connector: Emergency call button. Operational characteristics: Range: Max. 10 m from the radio, Average operation life of the battery: for operation mode 5/5/90 – 28 h / for operation mode 5/35/60 – 13 h. Volume control: Available. Environmental requirements: Dust - / waterproof: IP55
