<Transmission Unit> Main Specifications 1. Detection Range (2-stage setting / Danger Distance and Warning Distance): Adjustable from 1m to 15m * Danger Distance: When a worker enters a very dangerous distance from heavy machinery * Warning Distance: When a worker enters a distance considered dangerous from heavy machinery ◎ Please set the Warning Distance longer than the Danger Distance * If the Warning Distance setting is shorter than the Danger Distance setting, the Danger Distance setting will take precedence, and the vibrations and sounds of the subunit will be a single pattern (the vibrations and sounds of the Danger setting). 2. In-vehicle Patrol Light and Engine Stop * If a worker enters the Warning Distance, the patrol light will turn on and a buzzer will sound * If a worker enters the Danger Distance, the engine of the heavy machinery will stop (the patrol light will also turn off and the sound will cease) 3. Up to 5 transmission units can be operated at the same site 4. Operating Voltage: 24V 5. Waterproof equivalent to IPX5

<Helmet-mounted receiver (sub-unit)> Main specifications 1. Detection distance (two-stage setting / danger distance and warning distance) changes vibration and sound ● In the case of danger distance: Vibration continues, and the alarm sound continues ● In the case of warning distance [when heavy machinery is approaching]: Vibration repeats at regular intervals of vibration ⇔ stop (approximately 1-second intervals), and the alarm sound also follows the same pattern, repeating sound ⇔ stop at regular intervals ● In the case of warning distance [when heavy machinery is far away or stopped]: Vibration repeats for about 0.5 seconds ⇔ stops for about 1.5 seconds, and the alarm sound also follows the same pattern, repeating sound ⇔ stop 2. LED lighting / blinking pattern ● When power is ON: Green light ● When power is OFF: Light off ● Battery level below 10% (in use): Red blinking ● During charging: Green blinking ● Charging complete: Light off ● At danger distance: Red light ● At warning distance: Orange light 3. Estimated usage time (battery capacity: 1000mAh) ● Approximately 30 hours (standby time) ● Approximately 3.5 hours (vibration and sound at danger distance) ● Approximately 5.5 hours (vibration and sound at warning distance) When the battery level falls below 10% during use, it will forcibly vibrate and continue to vibrate until the battery is depleted 4. Charged with a dedicated receiver charger (no USB port, using a conductive metal plate)

<Helmet-mounted receiver (subunit) 6-unit charger> Main specifications 1. Charging time: Approximately 5 hours 2. LED lighting/flashing pattern of the receiver (subunit) during charging ● During charging: Green flashing ● Charging complete: Green lit 3. Power supply: AC100V–240V 50/60Hz 4. Current: 200mA x 6 (units) *Maximum 1200mA