If the FreePulse headphones suffer from a design flaw, it's that users cannot adjust the length of the headband. Logitech's designers seemed to err on the side of caution and provided enough room for those with large heads or lots of hair. The rest of us will need to use the adjustable ear straps to position the extra headband away from the head to avoid bumping against the neck.
The Bluetooth transmitter for the FreePulse headphones is nothing fancy. The square, black transmitter measures 1.5-inches across and 0.5-inches deep, with a power button and a connection indicator on one end and an adjustable stereo minijack on the other. Unlike other iPod Bluetooth transmitters, the FreePulse doesn't use the iPod's proprietary connection port (leaving it free for devices like the Nike + iPod Sport Kit). The upside of the FreePulse's simplified transmitter is it can be used on any audio source with a stereo headphone jack--including computers and home theater systems. Logitech also includes a handful of adapters that give the transmitter a snug fit for 4GB, 5GB, Mini, and Nano iPods.
The features on the FreePulse headphones are wonderfully basic. Power buttons on both the headphones and Bluetooth transmitter turn red when activated, and then turn blue once they've established a Bluetooth connection. The volume control located on the right headphone was simple to use. Behind the volume control, on the top edge of the right headphone, you'll find the headphone's power button, which doubles as a volume mute button when pressed momentarily.
The Logitech FreePulse Bluetooth headphones were not intended to hold up to audiophile scrutiny. The ideal candidate for these headphones is someone looking for lightweight, unobtrusive headphones to use at the gym, or out on a jog--situations where wires are inconvenient and noise-blocking headphones could be hazardous. While we thought the FreePulse headphones provided better than average sound quality with bass to spare, users looking for high-fidelity wireless headphones should look at products like the NaviPlay Bluetooth headphones for iPod or Pioneer SE-DIR800C for home theater use.