A3 is: the non-intercom version A3 PRO is: Two-person Cross-brand Full-duplex Intercom + Mixing Intercom + Music Sharing + 1000m Distance + Multi-person Half-duplex Intercom + FM Support customization, with battery certification + product CE + FCC + ROHS + waterproof certification + quality report + SRRC + ISO9001 quality management system certification available There are both Chinese and English images available, customizable with multi-language voice prompts and multi-language manuals Net weight of a single product: 38.3G Single package gross weight: 141.6G Double package gross weight: 256G Product size: 83.5*45.2*13.8MM Single package size: 113*30*145MM Double package size: 120x75x100mm Single Packaging Box Information: One box contains 100 pieces with dimensions of 53*40.5*29CM and weighs approximately 15KG Double packaging box information: One box contains 100 pieces (50 sets). The dimensions are: 53*40.5*29cm 14.2KG