Braun treasure monitor BLB-36 type type with hypoallergenic silicone production, touching soft skin-friendly, environmentally safe, non-toxic, low radiation fuselage, convenient hands-free calling, one-touch dialing shortcuts, you can rest assured that your family wear. Instrument selection Switzerland U-BLOX GPS chip, low power consumption, high sensitivity anti-interference, precise positioning, industry-leading; GSM quad-band world wide; host light weight to 60 grams, the voltage and current of 3.7 volts and 20 mA; the larger volume , clear sound; lasting battery life, battery life is the industry leader.