Power supply voltage: 3.6 ~ 5 V Power consumption: 0.001 w Upgraded version with double horn. Welcome sounds in 5 languages: Chinese, English, Korean, Thai, Japanese. Application: shops, commercial complexes, luxury hotels, offices, factories, houses, villas, driveways, footpaths, supermarkets, restaurants, etc. When the customer passes through the detection area, the reception host will send a greeting message, create a friendly shopping environment for the store, and remind the salesperson that customers are coming. Anti-theft at night, keep the store peaceful. After proofing, it can be used as an anti-theft alarm, alarm volume up to 113 dB. Doorbell mode : 8-chord music chip, 40mm large horn, 36 alternative welcome songs, switch casually. Color light reminder mode is suitable for quiet environments such as offices. Colorful LED lights, adjustable brightness, distinguish multiple entrances by different colors. When the sensor has been triggered, the light on the host will light up for 2 seconds, very convenient for the light. Equipped with infrared sensor, magnetic door, remote control and other wireless probe accessories to form a multi-directional multi-zone protection induction network. You can choose different color light when adding the wireless sensors to distinguish the triggered area, each light can respond to 8pcs sensor at most. Remote transmission range Up to 280M in open space. Induction distance: 2 ~ 8 meters. The higher the summer temperature, the shorter the induction distance. The induction distance is different depending on the installation angle. Detection angle: 100 ℃ in horizontal; 15 ℃ in vertical universal adjustment base. Delivery quantity: Two pieces