Sennheiser has unveils a couple of new Bluetooth stereo solutions including the MM 400 and the MM 450 Travel. Both of the devices are designed to allow calls to be placed and received with mobile phones and to allow music to be streamed wirelessly.

The headsets both utilize Bluetooth 2.1 and A2DP technology and have a wired connection option with included adapters and cable. The MM 400 uses a closed design to help block noise as well and both devices are designed to fold flat for storage.

The MM 450 Travel has noiseGuard 2.0 to electronically eliminate 90% of unwanted background noise and it features TalkThrough that allows you to open a mic to the outside to hear what people are saying without removing the headset. Both units will ship in September at undisclosed pricing.