This set weighs less than half an ounce and one of them contains the Battery and the other the circuit, antennae and controls. The Ety8 Bluetooth Earphones are supported by your ear canal and comes in different sizes of ear-tips to accommodate the many different ear sizes. These earphones utilize the new, low power, full bandwidth Broadcom BCM-2037 chip set. This minimizes power consumption and maximizes practicality. They also provide noise exclusion levels from 35 DB to 40 dB. Includes: ety8 earphones, 8Mate Adapter for iPod, Leather case, Eartips, USB charging cable, Filter changing tool and filters

Compatibility: 1st & 2nd generation Nano, 5th generation iPod, 1st generation mini, 4th generation iPod, iPod and iPod with Color display

Package Contents: 

ety8 Stereo Earset

8Mate adapter

Assorted eartips

Filter changing tool and filters

USB charging cable

Leather case

Battery Life (iPod): 6-9 hours depending on the iPod model

Battery Life (non iPod): 7 to 10 hours depending on the connected BT device

Charging Time: 1 hour to 80% charge. 2-3 hours from empty battery to full charge

Frequency Response Accuracy:

50 Hz -6 kHz ± 3 dB

20 Hz -15 kHz ± 6 dB

Compatibility:

iPod nano 2nd generation (aluminum)

iPod nano 1st generation

iPod 5th generation (video)

iPod 4th generation (color display)

iPod 4th generation

iPod mini 1st generation

Profiles:

Bluetooth 2.0

A2DP

AVRCP