Feature: 1. Emergency Rescue: Built in GPS, DSC, MOB function, high precision positioning, record your geographic location, send SOS signal to others. 2. Floating and Submersible: IPX7 waterproof, quickly floats on the water surface, and can resist immersion for 30 minutes within 1m of water depth. 3. Sturdy and Durable: The marine walkie talkie has a flashing alarm function. After falling into the water, it will flash the alarm and vibrate to drain. 4. Noise Reduction: High volume, full and clear sound quality, noise reduction technology effectively reduces ambient noise and improves call experience. 5. Wide Application: Small body, ergonomic shell, easy to carry, used in port logistics, ships, fishing, shipping, automotive and other industries Specification: Item Type: Marine Radio Material: ABS Frequency: 156-163MHz Transmission Type: FM (16K0G3E)/DSC (16K0G2B) Battery Pack: 1 x 1500mAh Li-ion battery (DC 7.4V) (built in) Battery Model: BP-M004 Frequency Stability: ±10PPM Working Temperature: -15℃-+55℃ Waterproof Grade: IPX7 Transmitter: Output Power: 5W/1W Maximum Frequency Deviation: ±5KHz Stray Radiation: ≤0.25μw Adjacent Channel Power: ≥70dB Audio Distortion: ≤10% Current Consumption: ≤1.5A (high power) ≤0.7A (low power) Audio Output: ≤0.2A (max) Receiver: Sensitivity: ≤0.22μV Noise Suppression Sensitivity: ≤0.22μV Signal to Noise Ratio: ≥40dB Adjacent Channel Selectivity: ≥70dB Spurious Response Immunity: ≥70dB Intermodulation Immunity: ≥68dB Audio Output Power: ≥0.5W (10%) Plug Voltage: AC100-240V Uses: Used for port logistics, ships, automobiles, etc.. Package List: 1 x Walkie Talkie1 x Antenna1 x Back Clip1 x Hand Rope4 x Screw1 x Power Adapter1 x Vehicle Cable1 x Charging Base1 x Manual Note: Please charge according to the voltage used, using other voltages may cause fire and product damage!