1. Material: ABS 2. Using lithium batteries for power supply; 3. The maximum control distance can reach 800 meters. 4. Independent 100-stop electrostatic, 100-stop vibration and voice level keys; 5. Controller with blue backlight LCD; 6. Controller and receiver have power saving function. 7. Receiver double defense level can reach IP67 level. 8. Increase receiver support and train three dogs at the same time. 9. Independent keys make it easier to operate.