Feature: 1. 0.91IN DISPLAY SCREEN: PCB adopts immersion gold circuit board, and the antenna tuner adopts 0.91in organic light emitting diode display. 2. NPO CAPACITOR: All high voltage capacitors are made of NPO material, with a withstand voltage of 250V, with good accuracy and stability. 3. DURABLE MAGNETIC RINGS: All magnetic rings are made of micron iron powder produced by for BASF 6000, which has ultra low loss and heat generation. 4. SELF LOCKING RELAY: This automatic antenna tuner adopts excellent self locking relay, which is easy to operate, efficient and durable. 5. BNC CONNECTOR: The antenna tuner has 50Ω BNC female connector, made of copper, with good conductivity and stable connection. Specification: Item Type: Automatic Antenna Tuner Material: Aluminum Alloy, Iron, Copper, NPO Material Power: Minimum 1W, Maximum 15W Screen: 0.91in Organic Light Emitting Diode Battery Specification: 14500 850mAh lithium battery x 2 (built in battery) Current Consumption: Working Mode: 12mAh Sleep Mode: 170μA Shutdown State: 37μA. Package List: 1 x Antenna Tuner