Specification:1.Bluetooth V3.0;2.Distance: 10M;3.Working frequency：2.4 GHz;4.Working current:1mA;5.Workingvoltage:3.0 V - 4.2 V;6.Battery:3.7V lithium batteries.7.Phone holder part,fit phones 6.5-10.2cm width.8.Stretch Length:23.5cm-110cm,6-segment length adjustable

Use methed:1.Open:short press the power switch,green LED lights up,after 1second,the green led lights down;2.Paired/online:2.1 Press the camera key for 2seconds,the green LED is flashing,the device is pairing mode;2.2 Open mobile phone search bluetooth device,the bluetooth device is self timer-03；2.3 Click the self timer-03link of bluetooth devices;wait for 8seconds,when the green LED is constant lighting,they are paring successful;3.Photos:Short press the photo keys,photo is complete;4.Focal length setting(only compatible for samsung devices):long press" " key to enlarge the focal length;long press"-"key to narrow the focus;5.Power off:press 3seconds power key;6.Charging:the mirco usb interface is at the bottom of the selftimer,when you charge it,and the red LED is lighting