The lenses of the bluetooth sunglasses can be easily changed to prescription lenses. The product comes with two earphones. One can be hang on either leg of the glasses. The other is stereo earphones can be used as a necklace with/without the sunglasses. > > Specifications: 1. Blueooth v 1.2 compliant; 2. Operating frequency:2400~2483.5mhz; 3. Range:10 meters (30 feet); 4. Talk time:5 hours; 5. Standby time:150 hours. Features: 1. Voice dialing* ; 2. Answering a call; 3. Rejecting a call; 4. Ending a call; * mobile phone must support this function What are in the box? 1. Sunglasses (1set); 2. Hanger earphone (1 piece); 3. Stereo earphones (1 set); 4. Charger (1 piece); 5. Manual (1 book in english and chinese); 3. Clip pads (2 pieces).
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