UTB-10 5-Pack. 3 batteries type; Transmission distance: Approx. 328.4 - 164.4 ft (100 - 500 m) (depending on conditions); License: No Qualifications Required; IPX2 (not waterproof); No intermediate communications; Can operate for about 60 hours on 3 AA alkaline batteries for approx. 60 hours when ambient noise is concerned, loudness function is loudness function can be used with the UBZ-LP20 etc.