Motorcycle Helmet Intercom Bluetooth Headset For 2 Rider... Generally, they run for 30 seconds five times a day for about a week. 500 1000 Meter Range Intercom 2 Way Voice Intercom Super Long Range Wireless Intercomunicador Waterproof Intercom Doorbell System Unit Wireless Intercom System Transmission distance: 1000m in open area, 20-50m through wall DOORBELL UNIT: The pack contains 2 pcs doorbell system units, which can switch between ringtone call and intercom mode. Working temperature: -20 ℃ to 55 ℃ LONG BATTERY LIFE: The 2 way voice intercom has built in large capacity battery, adopts intelligent power saving chip, with long battery life. Allows you to identify visitors outside the door based on sound to help you keep an eye on your home. Two-Way Voice Doorbell: The perfect combination of indoor and outdoor dual intercom allows you to communicate with visitors outside the door. It has low energy consumption. Long Standby Time: The doorbell is built with 3., 7V 2000mAh rechargeable lithium battery. Wireless Intercom System for Home, Two Way Voice Intercom Doorbell Portable Ultra-Long Distance Room to Room Intercom Home Communication System, for Kids Elderly Office Laboratory Use Specification: Item Type: Two-Way Voice Intercom, Material: ABS, Model: H8, Battery: 3., 7V 2000mAh rechargeable lithium battery (built-in), Basic parameter: LONG RANGE: The transmission distance of the voice intercom device can achieve 1000m in open area and 20 to 50m through wall, highly practical. Loud volume: The speaker is loud and adjustable, and the sound is clear. LONG RANGE: The transmission distance of the voice intercom device can achieve 1000m in open area and 20 to 50m through wall, highly practical Easy to use: The doorbell adopts a button call.
