Features:* High stability probe charging, charging technology.* The sub-machine has no screw design, and the product is more integrated.* Touch keyboard, waterproof and dirt-resistant, responsive.* Three alarm modes, buzzer, flashing light, buzzer + flashing light, the alarm duration can be set from 1 to 999 seconds.* Call record query, support querying the last 10 call records.* Splash-proof design, not afraid of soup and other liquids damaging the body.* Long-distance coverage, the longest distance can reach 1000m.Specification:Host:Input power: DC 12V/2ATransmission frequency: 433.92MHzStandby current: 50mAEmission current: 300mATransmit power: +34dBm (2500mW)Modulation mode: OOKNumber of charging sub-machines: 16PCSThe number of submachines that can be paired: 998PcsKey mode: touch keyShell material: ABSSize: 234*143*31mmcolor: WhiteSub-machine:Working voltage: Lithium battery 3.7V 150mAhReceive frequency: 433.92MHzStandby current: 10mAAlarm current: 90mAReceiving sensitivity: -113dBmStandby market: 15hTransmission distance: 1000mPrompt mode: buzzer/flashing lightRemind the market: 1-999 seconds can be setHousing material: 95*51*11mmcolor: WhitePacking included: 1 * Host16 * Sub-machine1 * User ManualNote:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.