The best handheld evolution transmitters meet the best microphone capsules. All 500-series hand-held transmitters are equipped with user-swappable capsules from the successful Sennheiser evolution 900 stage line standard. This combines intelligent G3 wireless features with powerful, cutting sound. Standard charging contacts are included to recharge the optional rechargeable battery. G3 wireless and evolution 900 series capsules work in harmony to ensure your performance is heard with the best audio possible.