Features： 1、Quickly release button, just press it to slide open and then take out phone. Press the arms on both sides to clamp the phone again. 2、Wide compatibility, suitable for smart phones or electronic devices with a width of 1.9 inches to 3.8 inches. 3、With dual USB fast charger (QC3.0&5V/2.4A), it supports charging two electronic devices at the same time. 4、Simple installation, just clamp the clip directly on the air outlet of the car air conditioner, and then plug it into the power supply. 5、One‑button switching subwoofer, convenient to operate. 87.5mhz ‑ 108mhz FM frequency, stable performance. Specification： Item Type: Bluetooth FM Transmitter Material: Fireproof PC Bluetooth Version: Bluetooth 5.0 Transmitting Power: Class 2 (-6dbM -+4 dBm) Bluetooth Frequency: 2.402-2.480GHZ Valid Bluetooth Range: Approx. 5m/16.4ft Input Voltage: DC12-24V Output: 5V/2.4A Installation: Clamp the air conditioning grid blade FM Frequency: 87.5mhz - 108mhz Support Agreement: A2DP1. 3 / HFP1.7 / HSP1.2 / AVRCP 1.6 Micro Memory Card Capacity: Up to 32G (NOT Included) Package List： 1 x Car Bluetooth Charger   1 x Air Conditioner Clamp 1 x Cable  1 x Manual