Features: Wireless Headset Mono Headphone Bluetooth Earphone For iPhone 1. Fashionable single-ear design, ultra comfort earpiece, much more fashionable. & personality. 2. Connection Type: Bluetooth V2.1 3. Built-in Battery. 4. Volume control: Volume up/ Volume down. 5. Working distance: About 3 Meters 6. Compatible with most bluetooth enabled device, such as cell phones, smart phones or laptop/pc which have bluetooth function. 7. Surpport System: Windows 98/2000/XP/ Vista/win 7 Important note: 1. It can't use more than 1A & 1A charger. 2. This earphone may not fit to your ear if your ear is too small or large, do not fit left ear:) If you received the item have any problem, please contact us first, we are very happy to help you solve the problem :) Descriptions: 1. Bluetooth version: V2.1+EDR 2. Frequency range: 2.4 G Hz--2.48 Ghz 3. Charging: 0--45 4. Transmission distance: ≤10 M 5. Operation voltage: 3.6V 6. File format: Headset & hands-free format 7. Channel: Mono 8. Talking time: ≤2H 9. Standby time: 60 hours 10. Standby current: ≤1m A Usage: 1. Long press the Answer/end button till indicator light shows blue & begin flash. 2. Turn on the bluetooth device of your cellphone, & searching the bluetooth device named 8015. 3. Normally it will not need pairing pass word, but if it is needed, pairing pass word is 0000. 4. Answer or reject the phone calls by pressing the answer/end button, & you could also volume+/volume- by pressing the side buttons. 5. You c