Features 1. Compact size and lightweight design for easy portability. Built-in 500mAh rechargeable battery. Equipped with CSR8635 chip from UK. 2. Latest Bluetooth 4.1 + EDR technology ensures stable signal transmission, low power consumption, and compatibility with iPhone and Android devices. 3. Supports hands-free calling with one-touch answer and end call function. Press the power button once to answer a call, press again to end the call, and press twice to redial the last number. 4. Built-in high-quality noise-reducing microphone with external windproof sponge for clear voice transmission and high-fidelity audio during hands-free calls. 5. Supports music playback control including next/previous track, volume adjustment, play/pause, and auto redial functions for convenient operation. 6. Features a mini USB charging port for fast and easy charging. Built-in lithium-ion battery with multi-circuit protection provides extended standby and usage time. 7. Tone alert function allows easy operation based on audible prompts. 8. Auto-reconnection with memory function. If the connected device is powered on within range, the headset will automatically reconnect to the previously paired device. 9. Designed for use with full-face helmets, half-face helmets, off-road helmets, and flip-up helmets. Specifications: Material: Plastic Color: Black Bluetooth Name: BT12 Bluetooth Version: 4.1 + EDR Frequency Range: 2.402 GHz - 2.480 GHz Transmission Range: 20-30 meters (varies by device) Microphone Transmission Distance: ≤ 1 meter Playback Time: Up to 15 hours Standby Time: Up to 240 hours Charging Time: Approximately 3 hours Battery Type: 3.7V / 500mAh Li-ion Charging Voltage: 5V Distance Between Speakers: Approximately 43 cm Speaker Wire Length: Approximately 17 cm Speaker Diameter: Approximately 4.1 cm Net Weight: 127g Notes: 1. Fully charge the helmet headset (approximately 2 hours) before first use. 2. The LED indicator glows red during charging and turns off when fully charged. 3. The headset cannot play music or receive calls while charging. 4. Slight variations in color and dimensions may occur due to manual measurement and screen display differences. Package Includes: 1 x Wireless Headset