Ultrasonic hair connector Video demo available Ultrasonic hair connectorCompared with usual connectors,It has the features as following:1. Fast workingPlug and use. The usual extensioners take several minutes to heat up (120 centigrade).2. Safer Cold melting by ultrasonic ,no heat.Cold tips melting the keratin all the time during performance. Impossible & no worry about scorching head ,hair &skin ...