Smallest Bluetooth 2.0 Headset! - Exwell(BTH-03)

Smallest Bluetooth Mono Headset, BTH-03: is the smallest and
lightest headset in the world which offers superior sound quality.

Technology:
Utilising lightweight components in its construction, Bluetooth
Headset BTH-03 weighs only a feather-weight 10 grams. Utilising
the latest Li-ion battery technology for optimum battery life & a high
efficiency 2.4 GHz. antenna for exceptional range and minimal signal
degradation. The BH-M03 adds Bluetooth 2.0 specification, reducing
interference from other Bluetooth & RF devices, giving the BTH-03
exceptional sound.

Comfort:
The completely redesigned soft tip backpiece turns 360 degrees to
accommodate both left and right ear users. Speaker and soft spring
are now a single soft silicone unit. The battery is user-exchangeable,
and recharges via the Mini-USB port on the headset (PC and MAC
compatible). Additionally a car charger and a wall adapter can be
bought separately.

General Radio: Carrier Frequency : 2.4 - 2.480GHZ.