Electro-magnetic inductionInput (requirements for adapter): 9V/1.67A, 12V/1.5A-3AOutput: 15W / 10W / 7.5W / 5W (auto-adaptation)Working frequency: 110 KHz-205KHzProduct standard: QiCharging distance: =10mmCharging efficiency: =80%Product dimension: 114mm x 71mm x 54.8mmProduct weight: 115gCable: 1m USB-C to USB-A cable2 x touch buttons for one handed operation: 1x on the left and 1x on the right sideDuration of rest power after power off: 5 hoursDuration of ability to open/close clamps after power off: 30 minutesHow many times arms can be opened after power off: 2-3 timesTriangle support: yes2 LED status indicators: Green - standby, Blue - ChargingPhone case thickness max. (mm): 4mmPhone width min to max (mm): 60-90