With modularity you can upgrade as new technology is introduced or as your needs evolve, hence extending the functional lifetime of your product. The latest S05 Speaker Units are the 2nd generation, MKII. Listed below are the key ways to identify the version you have:

• On the inside of the speaker unit, notice the product name. The 2nd generation states "S05 MKII".
• At the top of the speaker unit, notice the 3.5mm analog connection for the headband. The 2nd generation S05 is without cable locks for the headband to make assembly and disassemly easier.
• On the outside of the packaging, notice the product no. The 2nd generation S05 states 10007.